The LiIon I have seen so far have typically 3.6V per cell.
So switching two in series you will get 7.2V, which is perfect.
No regulator needed.
The problem in charging them is that they have a charging profile, which is
completely different from that of conventional NiMH and NiCd type batteries.
Johannes
> -----Original Message-----
> From: newtontalk-bounce_at_newtontalk.net
> [mailto:newtontalk-bounce_at_newtontalk.net]On Behalf Of john Mantooth
> Sent: Thursday, August 08, 2002 8:27 AM
> To: newtontalk_at_newtontalk.net
> Subject: Re: [NTLK] Newton 2100 battery pack
>
>
>
> What about using two of these 7.4v batteries in parallel and a
> voltage regulator to
> keep the voltage to the
> proper level? With two batteries, there should be enough space
> for some circuitry
> to regulate the voltage,
> perhaps a way to recharge from the Newton? Don't worry, I am not
> an electrical
> engineer, and I love my Newton
> way too much to do anything like this without having it checked
> out first, but I am
> curious how this might be
> done.
>
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