I got a new Lenmar LIS970P 7800mAh battery from buy.com for my 702, and have not been able to successfully charge it in the unit. When I plug in the AC adapter, the battery charge light flashes yellow, as expected, but in 5-10 minutes, it becomes solid yellow, indicating it's done charging. But when I unplug the 702 and turn it on, the voltage is in the low 6s and the green power light is flashing and it powers down not too long after (when I plug in some mics to speed up the process). I plug in the adapter again and the yellow light starts blinking, but again after 5-10 minutes it becomes solid yellow, and so on and so forth.
So I'm wondering if the 7xx recorders have any issues charging the Lenmar in the unit or if maybe this battery is defective or do I need to charge it in an external charger first or what not. I've searched but couldn't find much on this specific battery (but found threads saying that charging in the unit works well generally). Any input would be appreciated, thanks!