1.5V AAA 400mAh li-po rechargeable lithium batteries
I was looking for some rechargeable AAA batteries for my Magic Jack WIFI phones.
An LED indicator on the side tells when the battery is fully charged by any micro USB cable.
Only problem is that they cannot be charged inside of any recharging device...they use a micro USB cable.
The cable is included with two costing $17 with free shipping on E bay.
NiCad or NiMh batteries charge differently with different voltage tolerances.
So even if they cost $8 apiece, you can only use them in devices using regular batteries!