Sx3 clay breaker Posted October 13, 2011 Report Share Posted October 13, 2011 Hi there how long do u think I would get lamping with a lf 170 75 watt bulb with 7 amp battery cheers sx3 Quote Link to comment Share on other sites More sharing options...
handy4454 Posted October 13, 2011 Report Share Posted October 13, 2011 Hello mate what you need to do is convert the lamp power in Watts (75) to Amps,if you divide 75 by 12,which is the battery voltage you get 6.25 Amps,with a 7 Ahr (Amp hour) battery that should give you just over an hours use, 6.25 into 7 equals 1.12 thats in a perfect world though and in reality if the battery is not fully charged or its past its best then you will get a bit less,if the lamp is 6 volt you will get abour 20 minutes! atb handy Quote Link to comment Share on other sites More sharing options...
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