Bike lost 10 lbs and gained power
The 3-year-old sla battery pack in my currie technologies ezip men's trailz electric bicycle was in need of replacement, and i would have liked to replace it with 24 volt rmb lithium ion (lifepo4) long range 9.6ah battery pack & charger included for currie, ezip & izip electric bicycles rather than currie technologies 24-volt bicycle battery pack, black. But with a price difference of over $400, i thought i could do better...Especially after seeing these "drop-in" lithium replacement batteries, which are charged by the same charger as the sla batteries...Unlike currie's lithium batteries. These lithium iron batteries have the same voltage and ah rating as currie's sla batteries.To open the sla battery case requires only removing 5 screws; inside are two 12-volt, 10ah sla batteries. Unfortunately, these two batteries do not "drop-out" as easily as new batteries drop-in; the wire terminals were soldered to the battery terminals. Fortunately i anticipated this and as well purchased gardner bender 20-145f 1 12-10 gauge yellow female terminal disconnects, 16-pack. I split the connecting wires next to the old terminals and installed and connected the new terminals (this brand of terminals were initially too tight to fit the battery; however, by "stretching" the opening slightly with a male terminal of the same brand, they ended up fitting perfectly, and i saw no need to re-solder the connection.) an additional minor complication is that these lithium batteries are about 1/2" shorter than the sla batteries, but i was able to make up the difference by adding a sliver of styrofoam to the bottom of each battery.Lithium batteries maintain a more constant voltage as they discharge; as a result, for the first time, i had close to the same power at the end of my ride up a hill as i had at the beginning. By purchasing two of these lithium batteries, plus a package of terminals, and doing a little work, i saved nearly $200 over the price of currie's lithium battery pack, and could not be happier with the way they perform.