Shahriar Posted June 7, 2005 Report Share Posted June 7, 2005 HiI have a Rechargable battery. Something is written on it. "12V - 4.5Ah". What does Hour ("h")means here. Does it mean it can gives 4.5A at 12V for an hour?ThanX in advanceShahriar Quote Link to comment Share on other sites More sharing options...
audioguru Posted June 7, 2005 Report Share Posted June 7, 2005 Hi Shariar,It can give 12V at 450mA for 10 hours. At 4.5A, it will waste some of its power as heat, so will last less than an hour, maybe only 45 minutes. ;D Quote Link to comment Share on other sites More sharing options...
ante Posted June 8, 2005 Report Share Posted June 8, 2005 On many lead acid batterys the discharge time is indicated like 12 V 4.5Ah/5h. This means that 5hours is the shortest discharge time in which you can expect 4.5Ah from this battery. Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted June 9, 2005 Report Share Posted June 9, 2005 well guys!i dont see any reason for the mention of time in such a case.dont u think so?we hardly need this parameter. ;D Quote Link to comment Share on other sites More sharing options...
audioguru Posted June 9, 2005 Report Share Posted June 9, 2005 Hi Prateek,Of course a rechargable battery should include time in its ratings. It is its capacity, or how long its charge will last for a certain load.I think all batteries, especially disposable ones should state their A/hr rating. Instead of "super heavy duty", whatever that means. ;D Quote Link to comment Share on other sites More sharing options...
ante Posted June 9, 2005 Report Share Posted June 9, 2005 Hi prateek,The Ah value does not say much unless you know the discharge time! 8) Quote Link to comment Share on other sites More sharing options...
Guest John Thapa Posted December 28, 2014 Report Share Posted December 28, 2014 Can 6v 4.5AH be used inplace of 6v 10AH?i had this battery in my samll car but it got damaged and i have only 6v 4.5 AH battery.Does it move wit h next battery Quote Link to comment Share on other sites More sharing options...
Hero999 Posted December 28, 2014 Report Share Posted December 28, 2014 Can 6v 4.5AH be used inplace of 6v 10AH?i had this battery in my samll car but it got damaged and i have only 6v 4.5 AH battery.Does it move wit h next batteryObviously a 4.5Ah battery won't hold as much charge as a 10Ah battery.The other issue could be maximum discharge current and charge current, if it has a built-in charger. Quote Link to comment Share on other sites More sharing options...
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