by Burgerman » 07 Aug 2022, 08:45
Heres what you are looking for.
A battery that fits. If thats a GRP34 and a GRP24 will not fit (will it?) then thats the best you can do.
And heres what is important.
1. Low internal resistance. So not worse that 4.5mOhm. The lower the better. So all the cheap batteries at 6 or more mOhm are useless junk.
2. Cycle life. Obviously more is better. MK Gel is 500 cycles @ 80% discharge, with CORRECT charging. And around half that if you dont...
3. Ah. This is the size of the fuel tank. But you never get all of it out. The lower the internal resistance, (see 1. above) the more of this rated Ah is available to use in a powerchair. And the faster and mre completely it charges in the overnight time we have.
So Batteries like the Odyssey (IF they will fit, must be 260mm long, 170mm wide maximum, and height unknown on your chair) will always perform better with greater control and torque than any other battery. Because very low impedance. At high $$$$...
MK is best for most people, but MUST be charged correctly or will soon give low range, and die fast.
MK AGM and most cheap AGM are pretty much crap! But easy to charge with a generic charger.
MK Gel is the one worth fitting. But needs a correct charge algorythm, That means no mobility chargers... Unless you measure what they do carefully.