This Canadian Dollar and United States Dollar convertor is up to date with exchange rates from October 15, 2015. Enter the amount to be converted in the box to the left of Canadian Dollar.
1.2V per NiMH and NiCad cell. 2.1V per lead-acid cell (car batteries are 6-cell (12.6V) and some golf carts are 3-cell (6.3V)) Finally, multiply the voltage (V) by the amp-hour (Ah) rating of the battery/pack to get watt-hours (Wh) and then compare. For example, the Switch 8 Solar Recharger is 3.6V and 2.2Ah (2200 mAh) By multiplying those two together you get 7.92W.
NiMH: Powerex Imedion; beware of off-brand batteries My favorite AA is the Imedion by Powerex. It's a good balance of capacity (2400 mAh), charge cycles (500), and low self-discharge rate (retains 85% after one year). The only downside is that they're slightly larger than regular AA's, so they might not fit in your device.