Lidl are selling battery chargers that are similar to Optimate chargers, but at a fraction of the cost - about £13
. It has various modes; 6v,12v ,car and motorcycle as well as maintenance and dead battery recovery functions. I tested it out on a dead battery, but it didn't manage to raise it back to life. No great surprise there really,since if it did work I guess the battery manufacturing indusrty would close down
.
I've so far tried it out on some small scooter batteries, a type 063 car battery and a Halfords Leisure battery. Seems to do the job ok, with the voltmeter showing all the test batteries were charged up nicely.