In article ,
Theo wrote:
One is that the real test of cells is their longevity. Top end laptops
spec their batteries have 80% capacity at 1000 cycles, and they mean it.
A lower quality battery might only get 250 cycles. You only get to
find this out several years down the track, long past any 'buyer
protection' has expired.

'Vaping' batteries are an interesting one. Usually Li-ion, they often come
in a sealed housing with switch and overload protection etc, and shut down
before totally flat. Normal sort of load on a single cell 1500mA.hr one is
about 2 ohms. So quite heavy. And in plactice, you might be lucky to get
50 cycles out of them before they deteriorate.

Luckily for extra cost you can get a so called MOD type. This is a case
plus electronics with replaceable cell(s). And a 2500mA cell costs about 8
quid - under half that of the smaller sealed units. And hopefully will
last more like the claimed 500 cycles or so - looking good at the moment.

--
*Hang in there, retirement is only thirty years away! *

Dave Plowman London SW
To e-mail, change noise into sound.