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Makers and Making: need a battery
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borisblade17
Feb 8th 2013
hey everyone,

i need some help picking out a battery.
it needs to be twelve volts, light as possible but beable to put out 4.2 watts.
it will be powering a solenoid so it wont be sustained power.
please help! thanks
oh and rechargeable would be great! but not absolutely a must if the battery is cheap enough
alankilian
Feb 8th 2013
4.2 Watts at 12 Volts is (4.2 / 12 = 0.35 Amps) so one of those tiny 12 Volt batteries from a garage door opener remote will work.

Type 601T/23a They are about $2.00 each.
borisblade17
Feb 11th 2013
thanks!
Im going to give that a try
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