modality - a method of therapy that involves physical or electrical therapeutic treatment. rehabilitation - the treatment of physical disabilities by massage and electrotherapy and exercises.
Alkaline AA batteries are rated 1.5 volts, while NiMH AA batteries are rated at 1.2 volts. NiMH generally refers to a battery being rechargeable and to the materials from which the battery is constructed.
The amp-hour rating of a battery (also known as âAHâ) is a measure of how many amps a battery can supply for a period of time. It is calculated using the formula Amps X Hours. For instance, in the ideal world, this rating would mean that if you have a 33AH 12 Volt battery, you should be able to supply 33 Amps (~412 Watts) out of it for 1 hour, or 16.5 Amps (~206 Watts) for 2 hours, or 8.25 Amps (~100 Watts) for 4 hours, etc.