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Boeingman

Magnet Batteries

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For those more technically minded than myself. I have a magnet battery which is a 12v 7Ah battery which is on its last legs. If I buy a new one which I want to last longer than the original, do I just up the Ah side of things. What do people use?

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7Ah = 7 Amps for 1 hour (or 1 Amp for 7 hours)

Typically (I understand) the pigeon magnet will draw 2Amps so a 6Ah battery would last 3 hours from fully charged to fully flat (in a nice linear world) - however voltage will drop as the battery loses charge so a 7Ah battery will probably last 2.5 to 3 hours, a 12Ah battery 4.5 to 5.5 hours and a 17Ah battery 7 to 8 hours (max).

Based on the above and your original question @Boeingman yes, up the Ah.

I'd (personally) avoid a 'lead acid' battery (unless it's "sealed") and go for a Gel or AGM battery. Batteries can lose their ability to hold charge and 'lead acid type batteries' are best left on a low/trickle charge to avoid sulphation (which is what forks them).

 

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Lithium ion is undoubtedly the way to go. Half the weight, more power and deep cycling but at £80ish a pop a bit pricey. I guess give it time and the price will come down. Meanwhile I'll carry on yomping my lead acid batteries and hernia.

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