25.9V Li-ion - Recycled!
I decided to do an "in-depth" comparison of my Li-ion replacement vs the eZip oem SLA pack.
..... 25.9V 31.2Ah (9lb 12oz) = 808Wh ..... vs ..... 24V 10Ah** (15lb 2oz) = 240Wh (120-140Wh usable)
SLA is a major heat producer - 40-50% wasted as heat!
Li-ion and lipo, at modest rates, near 100% efficient. No noticeable heat production!
SLA (10Ah) - expended in 1 hour = 6.14Ah *
24V x 10Ah = 240wh
.614C drain = 147w output to motor for 1 hour and 93wh wasted heat ~60% efficient
1C drain (10A) = 240w output to motor for 1/2 hour and 120wh wasted heat ~50% efficient
Li-ion - recycled laptop cells.
25.9V x 31.2Ah = 808wh (Smaller than and weighs about 1/2 the 10Ah SLA pack!)
.2C drain = 160w output to motor for 5 hours and 2-3wh wasted heat per hour ~98% efficient
.333C drain = 260w output to motor for 3 hours and 10-15wh wasted heat per hour ~95% efficient
The recycled Li-ions I use are designed for a .25-.33-.5C discharge rate. 2-4 hour runtime.
Surge output, IMIO, should be limited to 1C. 31.2Ah pack for ~30A controller.
*SLA batteries are typically rated at a 20hr discharge.
A 10Ah discharged in 1hr, typically, outputs a meager 6.14Ah.
**SLA pack rebuilt with 11Ah "rated".