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Re: Expert battery advice needed - Aixam Mega City

Posted: Thu Jan 24, 2013 11:48 am
by ambey
Hi Greg,
Thanks for your thoughts. The inbuilt charger on the Aixam only looks at the terminal voltage of each of the 12, 12V batteries, not at individual cells so a new charger looks required. Considering the extra cost of Lithium over Lead and a new charger weighed against my maximum daily mileage I don't think it stacks up to swop to Lithium so I think I will do a straight replacement of my ABM 6-DM-76's.
Do you have any suggestions of a UK supplier of these or similar 73AH batteries?
Thanks. John

Re: Expert battery advice needed - Aixam Mega City

Posted: Thu Jan 24, 2013 6:17 pm
by GregsGarage
Secbattery.com may have a suitable replacement. I used them quite a few years ago and found them help.

Re: Expert battery advice needed - Aixam Mega City

Posted: Fri Jan 25, 2013 1:15 pm
by ambey
Hi Greg, thanks for that, I have submitted enquiry and will let you know.
cheers
John :)

Re: Expert battery advice needed - Aixam Mega City

Posted: Sun Mar 24, 2013 1:53 pm
by ambey
Hello,
I have found Leoch Deep Cycle Battery 12v 75Ah - LPC12-75 which is a virtual direct replacement for the existing batteries.
I got 5 from a mobility scooter company on ebay for a very good price and 7 from the Battery Company at a reasonable price.

In total, the average cost including VAT and delivery for each battery was £102.80 which is a very good price !!. I have installed the batteries and they work fine. The external dimensions are very slightly different which meant I had to shuffle the batteries slightly so the interconnection leads would reach but apart from that I am very pleased. I hope these last another 5 years like the origional ones did !!
John :D

Re: Expert battery advice needed - Aixam Mega City

Posted: Sun Aug 14, 2016 2:12 pm
by martinwinlow
So, someone please correct me if I am wrong, but Carl's photo of the AMC's battery layout suggests a '3P 4S' (3 parallel, 4 series) layout which equates to a nominal pack spec of 48V, ~200Ah weighing ~250kg?

If so, seems to me the ideal replacement solution would be 4 x Valence U27-12XP on their sides weighing, together, a 'mere' 80kg with about 30% more capacity (allowing for Mr Peukert)... only they cost £2k EACH!... unless, of course, you could find some decent second hand ones... ;)

I would guess as well as a small range improvement, the acceleration would be transformed, too.

Does anyone have any technical documentation and/or diagnostic tools/software/hardware for these vehicles? Or any knowledge thereof?

I have a possible scheme for a few of these cars in mind but any sort of official servicing would be impossible - it would all have to be DIY...