What are the Differences Between NiMH and Li-ion Rechargeable Batteries?
NiMH Pros High Energy Density: These have an average of 2200mAh (milliampere hours—the amount of current in milliamperes that it can give multiplied by the time in hours). This is greater than the 1500mAh seen in Li-ion batteries. These are the standard numbers in 1.2v NiMHs and 3.7v Li-ions. Compatible: If you have 10 gadgets using an NiMH battery, you can use a single pack to power them all—not simultaneously, of course. NiMH uses standard sizes so they are compatible with [...]