[OZAPRS] Igate appliance instead of a PC

[Norm, VK3XCI]

Well done James!

I Will try simply replacing the lappy battery with a 12V SLA and see what 
happens. The existing batteries are to all intents and purposes a dummy load 
across the charger!




73 de Norm, VK3XCI
Mildura, Australia
The Wintersun City
QF15bt.

James Cameron wrote:
> Once had a laptop with an internal battery voltage operating range from
> 10V to 16V, so when the internal battery died it was replaced by a cable
> from an external 12V sealed lead acid battery.
> 
> If you want to try this with a laptop:
> 
> 1.  check the normal operating voltage range of the internal battery,
> 'cause giving the laptop's DC/DC converter something higher might let
> the smoke out or blow an internal fuse,
> 
> 2.  check that the laptop firmware is happy to run despite not being
> able to communicate with the battery management chip,
> 
> 3.  measure the current drawn and select a suitable external fuse or
> circuit breaker,
> 
> 4.  charge the external battery externally ... don't connect an AC
> supply into the laptop, since the laptop charging circuit won't work
> very well with the different battery chemistry.
> 
> 
> 
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