Battery life is often measured by cycle life, the number of full charge/discharge cycles before the battery reaches 80% of its original capacity. Keeping the discharge current relative to the battery’s amp×hour capacity low and the discharge shallow improves battery longevity. Typical 12 V sealed lead acid (SLA) cells, like the ones found a Go-Ped, can be cycled 300 times. Here are a couple of tips about buying replacement batteries. Manufactures that do not advertise cycle life are probably not worth buying from, as they may use lower quality materials. Also, be wary of vendors that claim their cheaper batteries are “replacements for” and “perform similar to,” yet have no datasheets to back up these claims. As it turns out, Best Batteries (B&B) provides lots of data about their batteries, and come stock with Go-Ped Scooters. The ESR 750 contains B&B HR-9 batteries intended for high-discharge rates. The replacement battery should have the same width and length but a taller height and also be designed for high-discharge rates and high cycle life. Below is a summary for three different batteries meeting this size and discharge rate profile. All the data was taken from datasheets on the B&B website. I decided to get the EVP12-12 which I purchased locally from Brandt Services Inc. in St. Louis, Missouri, which had excellent customer service, reasonable prices, and dirt cheap shipping. The discharge rate was calculated from the Go-Ped’s specified distance, max speed, and from the stock battery’s discharge characteristics.

Model	L×W×H (in.)	Discharge Rate (A)	Time (min)	Discharge Rate (A)	Cycle Life (cyles)
HR9-12	5.94×2.56×3.70	18	15	9	NA
EVP12-12	5.94×3.70×3.86	18	25	12	300
EB12-12	5.94×3.70×3.86	18	35	5	300

Fig. 2 Cleaning up the woodwork