On 29/07/2011 12:57, Dave Plowman (News) wrote:
In ,
Tim wrote:
Is there any essential difference in charger specification for gel
batteries fitted to motorised wheelchairs as opposed to conventional
lead acid?

Charger from original suppliers is around £70.00 del. whereas there
appear to be chargers available on line for around £25.00.

Gel batteries require a theoretical constant voltage charge. They are not
tolerant of overcharging unlike a wet type.

Ideally all lead acid batteries require constant voltage charging. Gel
batteries are just more sensitive to gassing and subsequent loss of
electrolyte through "over" or prolonged charging.