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Subject: Re: cordless phone battery display? - (NiMh) long
X-Newsreader: Forte Agent 1.91/32.564
Date: Sun, 05 Jan 2003 01:54:10 GMT
NNTP-Posting-Date: Sat, 04 Jan 2003 18:54:10 MST
On Fri, 3 Jan 2003 18:03:14 +0000, AC
>I would appreciate comments about this situation ?
>- the cause of the apparent on-cradle self discharge etc
>- relationship between battery status icon and actual charge in battery
>- possibility of battery health/damage with the apparent ongoing
> charging for a life in the cradle
Rechargeable batteries self discharge at a rate of 1-3% per day (I
With Nimh, it is really not possible to know the state of charge from
the battery voltage with any precision. The voltage stays flat until
the battery is very close to being empty. As soon as the "low
battery" icon comes on, you don't have much time left.
A lot of phones simply trickle charge the battery. Some might use a
constant currrent source. Others might simply have a resistor in
series with a power supply. The charge current is usually so low
that the damage is insignificant. Nimh is suppose to have no memory
effect, but can still suffer from voltage depression if you don't
discharge them once in a while. Just try leaving it off the cradle
until the low battery lite comes on.
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