Hi
For a real cheap ebook viewer and wi-fi, I'm really happy with my generic M-001. Well, it's far easier to use than my little Nokia N5800 for wi-fi and cheaper than Kindle. And I quite like the Android OS. All good ... apart from battery life. Herein lies my problem. Got a few ideas:
1) Hook up a larger, external 7.2 V batt (maybe a R/C racing car batt) in parallel with the built-in one. But I think this would lead to charging/discharging imbalance and probably destroy in-built batt over time. Mixing different capacity and types probably a no-no?
2) Use a 0.21 mm power supply socket which switches off the internal batt when my big, external one is plugged in. Might be best idea as 230 V supply will charge whichever batt is connected. So the built-in one would probably be my reserve.
3) Buy a big 9.6 V battery and plug it in to the existing charging socket. So effectively use this batt as the charger for the built-in one. BUT is the M-001 DC power supply regulated internally? It would need to be, else I'll cook the built-in battery. I note the open-cct voltage of the 230 V charger is about 9.2 V DC.
Sorry about the waffle. Anyone got any ideas or experience? Advice re above?

Thanks!