Re: NimH batteries
- From: Kit <kit@xxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 30 Aug 2005 19:15:11 +0100
John Lee wrote:
> I get very confused about NiMh batteries. On the one hand we are told that
> you don't have to have them fully discharged before recharging because
> they don't have a memory.
Memory effect is primarily a problem for NiCads, but NiMH apparently also
like an occasional full discharge & recharge cycle.
But on the other hand I understand that if you
> don't have an expensive charger that knows when full charge has been
> reached and automatically switches off, your batteries can overheat and
> deteriorate.
Overcharging a NiMH can cause damage to it.
I think I have hit on a simple solution. I remove the
> batteries before they are fully exhausted. Then I put them into a torch,
> switch the torch on and leave it on until the light dies. I then give the
> batteries a full timed charge as if for first charge.
> Is there anything wrong with this idea please? Thanks.
If the cells are in series in the torch then the first cell to fully
discharge may suffer _reversal_ which will cause damage.
Intelligent chargers may cost a bit in intial outlay but should be cost
effective in the long term if they keep the NiMH cells in good condition.
.
- References:
- NimH batteries
- From: John Lee
- NimH batteries
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