Originally Posted by mozzwald
You would have to get the measurements of both batteries and compare the sizes to see if the RAZR batt will fit. It looks to be the same voltage and chemistry.
It's not easy to get that info, but looks like the RAZR battery, altough surely electrically compatible is not the same size.
Razer's one is 1.5 cm longer, and is also narrower.
You cant use multiple cells without special circuitry for charging.
Well, surely you can't put two "smart" batteries in parallel from the outside, but it's feasible opening the battery and connecting properly the cells, internally.
But this must be done by someone who really knows what should be done, to avoid risky situations.