The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.

Is there a web site where I could get a new battery?
--
:-)
Don't let the Zombies get you!!!!

"Lord Bergamot" wrote in message
news

The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.

Just guessing - but its probably not unlike a laptop battery, in which case
almost certainly lithium.

Do not mess with lithium cells unless you know what you're doing!

Particularly multiple cells. They require a charge balancing system - if any
one cell gets over charged, it can go exothermic with a fairly entertaining
end of life performance.

Ian wrote:
"Lord Bergamot" wrote in message
news

The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.
Just guessing - but its probably not unlike a laptop battery, in which case
almost certainly lithium.
Do not mess with lithium cells unless you know what you're doing!
Particularly multiple cells. They require a charge balancing system - if any
one cell gets over charged, it can go exothermic with a fairly entertaining
end of life performance.

That could be interesting.

The battery is flat, appx 5mm thick, 60 mm wide & 80 mm long.

I might open it again soon & get exact measurements. It would be easy to replace, if I knew where to get a battery.

--
:-)
Don't let the Zombies get you!!!!

"Lord Bergamont" wrote in message
news


Ian wrote:
"Lord Bergamot" wrote in message
news

The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.
Just guessing - but its probably not unlike a laptop battery, in which
case almost certainly lithium.
Do not mess with lithium cells unless you know what you're doing!
Particularly multiple cells. They require a charge balancing system - if
any one cell gets over charged, it can go exothermic with a fairly
entertaining end of life performance.

That could be interesting.
The battery is flat, appx 5mm thick, 60 mm wide & 80 mm long.
I might open it again soon & get exact measurements. It would be easy to
replace, if I knew where to get a battery.

If its an actual flat cell in a heavy duty PVC pouch - they just flame - the
steel cased cylindrical type have safety vents, but I'm guessing these get
clogged with debris as the electrodes disintegrate. A youtube clip shows
someone deliberately shorting a cylindrical cell - several long boring
minutes of fizzing rather tamely culminated in the cell going off like a
firecracker. There was a small shower of sparks that could easily be a fire
risk, the steel case ruptured so if you're holding it you'd get lacerations,
the caustic burns would be a serious complication to healing.

Ian wrote:
"Lord Bergamont" wrote in message
news


Ian wrote:
"Lord Bergamot" wrote in message
news
The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.
Just guessing - but its probably not unlike a laptop battery, in which
case almost certainly lithium.
Do not mess with lithium cells unless you know what you're doing!
Particularly multiple cells. They require a charge balancing system - if
any one cell gets over charged, it can go exothermic with a fairly
entertaining end of life performance.

That could be interesting.
The battery is flat, appx 5mm thick, 60 mm wide & 80 mm long.
I might open it again soon & get exact measurements. It would be easy to
replace, if I knew where to get a battery.
If its an actual flat cell in a heavy duty PVC pouch - they just flame - the
steel cased cylindrical type have safety vents, but I'm guessing these get
clogged with debris as the electrodes disintegrate. A youtube clip shows
someone deliberately shorting a cylindrical cell - several long boring
minutes of fizzing rather tamely culminated in the cell going off like a
firecracker. There was a small shower of sparks that could easily be a fire
risk, the steel case ruptured so if you're holding it you'd get lacerations,
the caustic burns would be a serious complication to healing.

There's a place in China that will sell me 1000 batteries, but not one by it's self.
--
:-)
Don't let the Zombies get you!!!!

Lord wrote:
Ian wrote:
"Lord Bergamont" wrote in message
news


Ian wrote:
"Lord Bergamot" wrote in message
news
The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.
Just guessing - but its probably not unlike a laptop battery, in which
case almost certainly lithium.
Do not mess with lithium cells unless you know what you're doing!
Particularly multiple cells. They require a charge balancing system - if
any one cell gets over charged, it can go exothermic with a fairly
entertaining end of life performance.

That could be interesting.
The battery is flat, appx 5mm thick, 60 mm wide & 80 mm long.
I might open it again soon & get exact measurements. It would be easy to
replace, if I knew where to get a battery.
If its an actual flat cell in a heavy duty PVC pouch - they just flame - the
steel cased cylindrical type have safety vents, but I'm guessing these get
clogged with debris as the electrodes disintegrate. A youtube clip shows
someone deliberately shorting a cylindrical cell - several long boring
minutes of fizzing rather tamely culminated in the cell going off like a
firecracker. There was a small shower of sparks that could easily be a fire
risk, the steel case ruptured so if you're holding it you'd get lacerations,
the caustic burns would be a serious complication to healing.
There's a place in China that will sell me 1000 batteries, but not one by it's self.
--
:-)
Don't let the Zombies get you!!!!

I just checked EBAY and they have some there.

--
:-)
Don't let the Zombies get you!!!!

"Lord Bergamont" wrote in message
...


Lord wrote:
Ian wrote:
"Lord Bergamont" wrote in message
news

Ian wrote:
"Lord Bergamot" wrote in message
news
The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.
Just guessing - but its probably not unlike a laptop battery, in
which case almost certainly lithium.
Do not mess with lithium cells unless you know what you're doing!
Particularly multiple cells. They require a charge balancing
system - if any one cell gets over charged, it can go exothermic
with a fairly entertaining end of life performance.

That could be interesting.
The battery is flat, appx 5mm thick, 60 mm wide & 80 mm long.
I might open it again soon & get exact measurements. It would be easy
to replace, if I knew where to get a battery.
If its an actual flat cell in a heavy duty PVC pouch - they just
flame - the steel cased cylindrical type have safety vents, but I'm
guessing these get clogged with debris as the electrodes disintegrate.
A youtube clip shows someone deliberately shorting a cylindrical cell -
several long boring minutes of fizzing rather tamely culminated in the
cell going off like a firecracker. There was a small shower of sparks
that could easily be a fire risk, the steel case ruptured so if you're
holding it you'd get lacerations, the caustic burns would be a serious
complication to healing.
There's a place in China that will sell me 1000 batteries, but not one by
it's self.
--
:-)
Don't let the Zombies get you!!!!

I just checked EBAY and they have some there.

Yesterday I scored a pack of 6x 18650 from the recycling bin at the
supermarket.

The previous haul was marked "Made in China" and had no laptop brand printed
on it - my main requirement is for e-cigarette batteries, I might designate
the Chinese cells for an application I don't hold near my face when I press
the button!

Ian wrote:
"Lord Bergamont" wrote in message
...


Lord wrote:
Ian wrote:
"Lord Bergamont" wrote in message
news

Ian wrote:
"Lord Bergamot" wrote in message
news
The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.
Just guessing - but its probably not unlike a laptop battery, in
which case almost certainly lithium.
Do not mess with lithium cells unless you know what you're doing!
Particularly multiple cells. They require a charge balancing
system - if any one cell gets over charged, it can go exothermic
with a fairly entertaining end of life performance.

That could be interesting.
The battery is flat, appx 5mm thick, 60 mm wide & 80 mm long.
I might open it again soon & get exact measurements. It would be easy
to replace, if I knew where to get a battery.
If its an actual flat cell in a heavy duty PVC pouch - they just
flame - the steel cased cylindrical type have safety vents, but I'm
guessing these get clogged with debris as the electrodes disintegrate.
A youtube clip shows someone deliberately shorting a cylindrical cell -
several long boring minutes of fizzing rather tamely culminated in the
cell going off like a firecracker. There was a small shower of sparks
that could easily be a fire risk, the steel case ruptured so if you're
holding it you'd get lacerations, the caustic burns would be a serious
complication to healing.
There's a place in China that will sell me 1000 batteries, but not one by
it's self.
--
:-)
Don't let the Zombies get you!!!!

I just checked EBAY and they have some there.
Yesterday I scored a pack of 6x 18650 from the recycling bin at the
supermarket.
The previous haul was marked "Made in China" and had no laptop brand printed
on it - my main requirement is for e-cigarette batteries, I might designate
the Chinese cells for an application I don't hold near my face when I press
the button!

Chinese make cheap crap. Last night I tried to unplug a Chinese made adapter from the wall, it fell apart and I was almost electrocuted with 110 volts.

Some day I'm going to take time to look around trash bins at the supermarket. I've heard good things can be found.
--
:-)
Don't let the Zombies get you!!!!

Some laptop batteries are intelligent and won't charge unless conditions are met, won't overcharge, etc.

It may not be possible just to put any battery into a tablet, I dunno.

Tim wrote:
Some laptop batteries are intelligent and won't charge unless conditions are met, won't overcharge, etc.
It may not be possible just to put any battery into a tablet, I dunno.

Oh well.. The battery I ordered was inexpensive enough it won't matter, and I'm ready to buy a new tablet, if it doesn't work.

--
:-)
Don't let the Zombies get you!!!!

"Tim R" wrote in message
...
Some laptop batteries are intelligent and won't charge unless conditions
are met, won't overcharge, etc.

It may not be possible just to put any battery into a tablet, I dunno.

Most of the cells I've rescued for my E-cigarette seem to work just fine.

IMO; the 'intelligent' bit may often be a bit over zeallous.

On Monday, March 2, 2015 at 12:34:22 PM UTC-5, Ian Field wrote:
"Tim R" wrote in message
...
Some laptop batteries are intelligent and won't charge unless conditions
are met, won't overcharge, etc.

It may not be possible just to put any battery into a tablet, I dunno.

Most of the cells I've rescued for my E-cigarette seem to work just fine.

IMO; the 'intelligent' bit may often be a bit over zeallous.

We have an old Mac laptop with a missing charger.

I thought maybe I could remove the battery and charge it directly. There is not just + and GND on that battery, there are a lot of terminals and apparently a processor.

"Tim R" wrote in message
...
On Monday, March 2, 2015 at 12:34:22 PM UTC-5, Ian Field wrote:
"Tim R" wrote in message
...
Some laptop batteries are intelligent and won't charge unless
conditions
are met, won't overcharge, etc.

It may not be possible just to put any battery into a tablet, I dunno.

Most of the cells I've rescued for my E-cigarette seem to work just fine.

IMO; the 'intelligent' bit may often be a bit over zeallous.

We have an old Mac laptop with a missing charger.

I thought maybe I could remove the battery and charge it directly. There
is not just + and GND on that battery, there are a lot of terminals and
apparently a processor.

Multiple cell packs have sophisticated charge balancing circuitry - not all
cells are created equal, and the one that gets overcharged first goes
exothermic with fairly entertaining results.

You'd probably have to charge each cell individually - you could salvage the
end of charge shut off capsule from an e-cig and use a USB charger.

AFAICR: Most laptop chargers are 19V - you just need the right power jack
with the right centre pin polarity.

In the UK; I bought a universal laptop brick from Maplin (rip-off!) it has a
switch to select several voltages, and a rubber strip with an assortment of
changeable power jacks pressed into it.

Even at Maplin rip-off prices, it was probably a lot cheaper than most
genuine replacements.

On Monday, March 2, 2015 at 9:53:26 AM UTC-8, Tim R wrote:

We have an old Mac laptop with a missing charger.

I thought maybe I could remove the battery and charge it directly. There is not just + and GND on that battery, there are a lot of terminals and apparently a processor.

Yeah, the battery and charge circuitry is smart, which means it's a mess to
tamper with. The 'missing charger', on the other hand, is just a voltage source,
you can get replacements cheap, compared to a battery replacement price.

Tim wrote:
On Monday, March 2, 2015 at 12:34:22 PM UTC-5, Ian Field wrote:
"Tim R" wrote in message
...
Some laptop batteries are intelligent and won't charge unless conditions
are met, won't overcharge, etc.

It may not be possible just to put any battery into a tablet, I dunno.

Most of the cells I've rescued for my E-cigarette seem to work just fine.

IMO; the 'intelligent' bit may often be a bit over zeallous.
We have an old Mac laptop with a missing charger.
I thought maybe I could remove the battery and charge it directly. There is not just + and GND on that battery, there are a lot of terminals and apparently a processor.

There are only two wires on this tablet battery. When the solder
broke where the charger plugs in, before I soldered it, I charged
the battery directly, which might have been what caused the
battery to go wonky, although it never worked really great from
the beginning.

I always had to let the battery get down below 20% before plugging
in the charger, to keep it working good, and if I unplugged it before it
was fully charged it started having problems.

--
:-)
Don't let the Zombies get you!!!!

On Tuesday, March 3, 2015 at 11:49:06 AM UTC-5, Lord Bergamot wrote:

I always had to let the battery get down below 20% before plugging
in the charger, to keep it working good, and if I unplugged it before it
was fully charged it started having problems.

--
:-)
Don't let the Zombies get you!!!!

How old is this thing? "Memory" issues on rechargeable batteries, to whatever extent they existed, were solved decades ago.

"Tim R" wrote in message
...
On Tuesday, March 3, 2015 at 11:49:06 AM UTC-5, Lord Bergamot wrote:

I always had to let the battery get down below 20% before plugging
in the charger, to keep it working good, and if I unplugged it before it
was fully charged it started having problems.

--
:-)
Don't let the Zombies get you!!!!

How old is this thing? "Memory" issues on rechargeable batteries, to
whatever extent they existed, were solved decades ago.


There's a specific end point voltage per cell that you shouldn't discharge
below, overcharging can also shorten cell life (sometimes very abruptly!).

AFAIK: there is no memory effect associated with any lithium cells.

Apparently some manufacturers make chips with a constant power charging
mode - over discharged cells need to be coaxed up gently to a normal state
before piling on the normal charge rate.

Tim wrote:
On Tuesday, March 3, 2015 at 11:49:06 AM UTC-5, Lord Bergamot wrote:

I always had to let the battery get down below 20% before plugging
in the charger, to keep it working good, and if I unplugged it before it
was fully charged it started having problems.

--
:-)
Don't let the Zombies get you!!!!
How old is this thing? "Memory" issues on rechargeable batteries, to whatever extent they existed, were solved decades ago.

I bought it three years ago.

Except for the battery problems I've been happy with it.
--
:-)
Don't let the Zombies get you!!!!