Icom IC-A4 1650mAh NI-MH Battery Overview:

Aftermarket battery that replaces the 1050 MAH NI-Cad battery (BP-195 or BP-196) for the Icom IC-A4.

This is a 9.6v 1650mAh 5-Watt Ni-MH pack, ultra high capacity! Comes with a belt clip.

What's the difference between Ni-Cad and Ni-MH batteries?
The main difference between the two is that NiMH battery (the newer technology of the two) offers a higher energy density than NiCads. In other words, the capacity of a NiMH is approximately twice the capacity of its NiCad counterpart. What this means is for you is increased run-time from the battery with no additional bulk or weight. NiMH also offers another major advantage: NiCad batteries tend to suffer from what is called the "memory effect". NiMH batteries are less prone to develop this problem and thus require less maintenance and conditioning. NiMH batteries are also more environmentally friendly than NiCad batteries since they do not contain heavy metals (which present serious landfill problems).

Will my original wall charger work with this battery?
Yes, this battery will work just like the battery that came with your transceiver.  It's the same size and form factor and can use the same wall charger that came with your radio.