A useful comparison of SLA batteries

[Scimitar]

For those who have Sealed Lead Acid and want to stick with them, for reasons of purchase price and don't mind the weight.
These two videos are worth watching, if only to alert members to the folly of trusting manufacturers' claims...
Maplin Nikkai 4 in 1 Jump Starter review (part 1) - YouTube
Maplin Nikkai 4 in 1 Jump Starter review (part 2) - YouTube

 

[flecc]

There's a number of these junk jump-starters like the Maplin one on the market, often from mail order outfits. Best widely available ones I've found to be the Clarke ones from Machine Mart, more expensive but good capacity long lasting batteries.

 

[muckymits]

I like the offering from Doctorbass

Jumpstart your Car using some A123 Batteries - Hacked Gadgets – DIY Tech Blog

 

[banbury frank]

Hi If you want Proper battery's for E bikes


Ritar : Products

3X RITAR 12V 12AH/15AH BATTERIES FOR ELECTRIC BIKES | eBay


Frank

 

[neptune]

@Scimitar. These youtube videos [3 in all] are an interesting find. In video 3 he destroys half a dozen perfectly good batteries just to weigh the contents. He must have loads of spare money . As Frank points out, and as most of us probably know, not all SLA batteries are suitable for ebikes. The "gell cell" type as used in burglar alarms are not suitable for high current deep discharge work . So I would say that weight is a fair guide to what you are buying. I liked the test instrument that he uses to measure amp hour capacity, although you could probably get your batteries tested by your local Alarm Engineer . The test with the A123 cells was quite impressive, but I suspect the cars own battery was doing some of the work.