I am contemplating buying the bosch 14.4 li-ion drill driver for
casual use.

http://www.tooled-up.com/Product.asp...um-Ion-Battery

I can live with 1 battery (as I only use it occassionally) but for
another £30 they give a version with 2 batteries.

Bosch or anyone else do not seem to be capable of selling the battery
only.

So should I go for 2 batts when I can cope with one in case the batt.
fails etc or can anyone out there with experience of li-ion advise
otherwise.

Thx

writes:

So should I go for 2 batts when I can cope with one in case the batt.
fails etc or can anyone out there with experience of li-ion advise
otherwise.

Doesn't quite answer the question but Li-Ion is a poor battery
technology to use in a power tool. Whether or not you use them much
your new batteries will be fairly shagged within a few years.

Jon

Jonathan Schneider wrote:
writes:

So should I go for 2 batts when I can cope with one in case the batt.
fails etc or can anyone out there with experience of li-ion advise
otherwise.

Doesn't quite answer the question but Li-Ion is a poor battery
technology to use in a power tool. Whether or not you use them much
your new batteries will be fairly shagged within a few years.


Hmm.
Li-ion

- don't self discharge. Typically 90% charge retention over 6 minths
- are light
- can deliver plenty of power per unit size
- are tyoically larger capacity than comparable Nickel chemistry
- are not toxic.

The only two downsides I have found in EXTENSIVE use is that they do not
take kindly to being totally flattened, and they don't take kindly to
being overcharged.Plus the price, but that is now almost comparable.


That means an hour to recharge, and NEVER flatten them. Usually the
appliance circuitry will have an under voltage cutoff anyway.


With those issues in mind, they are in every other way superior to nickel.


Jon

The Natural Philosopher wrote:
Jonathan Schneider wrote:
writes:

So should I go for 2 batts when I can cope with one in case the batt.
fails etc or can anyone out there with experience of li-ion advise
otherwise.

Doesn't quite answer the question but Li-Ion is a poor battery
technology to use in a power tool. Whether or not you use them much
your new batteries will be fairly shagged within a few years.


Hmm.
Li-ion

- don't self discharge. Typically 90% charge retention over 6 minths

Do degrade - increase in effective series resistance, and capacity over
time, especially if kept at full charge.

Keep in fridge if not in use.

Ian Stirling wrote:
The Natural Philosopher wrote:
Jonathan Schneider wrote:
writes:

So should I go for 2 batts when I can cope with one in case the batt.
fails etc or can anyone out there with experience of li-ion advise
otherwise.
Doesn't quite answer the question but Li-Ion is a poor battery
technology to use in a power tool. Whether or not you use them much
your new batteries will be fairly shagged within a few years.

Hmm.
Li-ion

- don't self discharge. Typically 90% charge retention over 6 minths

Do degrade - increase in effective series resistance, and capacity over
time, especially if kept at full charge.

A lot less than nickel.
Typcially several years.
Keep in fridge if not in use.

********.

The Natural Philosopher wrote:
Ian Stirling wrote:
The Natural Philosopher wrote:
Jonathan Schneider wrote:
writes:

So should I go for 2 batts when I can cope with one in case the batt.
fails etc or can anyone out there with experience of li-ion advise
otherwise.
Doesn't quite answer the question but Li-Ion is a poor battery
technology to use in a power tool. Whether or not you use them much
your new batteries will be fairly shagged within a few years.

Hmm.
Li-ion

- don't self discharge. Typically 90% charge retention over 6 minths

Do degrade - increase in effective series resistance, and capacity over
time, especially if kept at full charge.

A lot less than nickel.
Typcially several years.

10-20% or so a year.
Matches the measured capacity degradation of several idle laptop Li-ion
batteries that I measured a couple of years ago.

Keep in fridge if not in use.

********.

The ones in the fridge have degraded lots less.

Jonathan Schneider wrote:

Doesn't quite answer the question but Li-Ion is a poor battery
technology to use in a power tool. Whether or not you use them much
your new batteries will be fairly shagged within a few years.

That depends. Conventional Li-ion batteries aren't brilliant for power
tools, but the performance of recent batteries is considerably better
than the older ones.

There is a brand new variant of Li-ion technology, out for about 18
months, based on 'nano-phosphate' electrodes. This battery type has
characteristics ideally suited to power tools:
Very high current/power - 2 Ah battery can supply 70A continuously
Very fast charging: Full charge in 5 minutes
Very high cycle life: 2000+
Very long shelf life even at high temperatures
Very low risk of spontaneous combustion - considerably less than
conventional Li-ion.

These are now being sold in high-end cordless tools (e.g. Makita and
Dewalt). The only problem is their enormous price.

M

wrote:
I am contemplating buying the bosch 14.4 li-ion drill driver for
casual use.

http://www.tooled-up.com/Product.asp...um-Ion-Battery

I can live with 1 battery (as I only use it occassionally) but for
another £30 they give a version with 2 batteries.

Bosch or anyone else do not seem to be capable of selling the battery
only.

So should I go for 2 batts when I can cope with one in case the batt.
fails etc or can anyone out there with experience of li-ion advise
otherwise.

Looking at the charge time of 180 minutes/3 hours a second battery could be
useful.


--
Dave
The Medway Handyman
www.medwayhandyman.co.uk
01634 717930
07850 597257

wrote:

I am contemplating buying the bosch 14.4 li-ion drill driver for
casual use.

http://www.tooled-up.com/Product.asp...um-Ion-Battery

I can live with 1 battery (as I only use it occassionally) but for
another £30 they give a version with 2 batteries.

I would say it is always worth having at least two batteries. That way
you don't have to stop work half way through a job.

Bosch or anyone else do not seem to be capable of selling the battery
only.

I think you will fond that all the decent manufacturers will sell
batteries separately:

http://www.lawson-his.co.uk/catalogu...ies/batteries/


--
Cheers,

John.

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