From an online battery store

OldNick

Newly Enlightened
Joined
Sep 3, 2006
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Location
Western Australia
I won't name them. I have emailed them. I just thought you may all be interested for a chuckle.

"If your device does allow you to upgrade the battery from Ni-MH to Li-ion, you will typically get longer run time. For example, if your Digital Camera uses a NI-MH battery that is 9.6 Volts, 4000mAh and the new Li-ion Digital Camera Battery is 14.4 Volt, 3600mAh, then you will obtain longer run time with the Li-ion battery.
Example:
Li-ion: 14.4 Volts x 3.6 Amperes = 51.84 Watt Hours
Ni-MH: 9.6 Volts x 4 Amperes = 38.4 Watt Hours
The Li-ion is stronger and has longer run time."

....and....

"When buying a battery, select batteries with the most Mill amperes (or mAh). Batteries are also rated by Watt-Hours, perhaps the simplest rating of all. This is found by multiplying the Volts and the Amperes together. For example:
14.4 Volts, 4000mAh (Note: 4000mAh is equal to 4.0 Amperes).
14.4 x 4.0 = 57.60 Watt-Hours
Watt-Hours signify the energy needed to power one watt for one hour. This FUJIFILM Digital Camera Battery can power 57.60 watts for one hour. If your laptop runs at 20.50 watts, as an example, this laptop battery could power your laptop for 2.8 hours."



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