Li-Ion batteries
On 02/11/2018 18:40, Steven Watkins wrote:
On Fri, 02 Nov 2018 16:53:15 -0000, Clive Arthur
wrote:
On 02/11/2018 14:58, Steven Watkins wrote:
snipped
I purchased some torches with 14500s claimed to be 2400mAh which I
didn't believe. I doubt that they were even close to 850/900mAh as
fully
charged they didn't last long in the torch. Replacement 900mAh
batteries
lasted much longer.
I have some GTL batteries (also called GIF) (Chinese ****) that say
2500.* I tested them (bulb, ammeter) and got 500.* Official tests I've
found on websites agree.* Got them free, I moaned at the seller and got
all the money back.
Decent makes like Efest, Sony, Sanyo are all quoted as 850 and reviews
say you really get that.* But 850 is pitiful, as NiMH gives 2700.
About the same energy, given that the lithium cells are about three
times the voltage of the NiMH.
But if you consider a Panasonic 18500, at 3Ah and 3.7V, it's twice the
energy per volume.* They just don't seem to get the higher charge
density in the smaller AA size.
ITYM "Thanks, I'd overlooked that, and 'pitiful' was clearly wrong".
Cheers
--
Clive
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