Electric bike battery question

2oldman wrote:

msmith1199 wrote:
Think they will work? (Li batteries).

The gobbledy-gook is something like this:

One horsepower is 768watts. Divided by 2 (for 0.5 hp) = 368w.
368 watts/24volts = 15 amperes of current. That's assuming your motor is ALWAYS running at 1/2 HP, but I doubt it is.

About those batteries in your link: They are 10ah. They show a discharge rate of 20A max continuous, 60A max 2-second pulse. ... For longest lifetime recommended discharge rate 1-5Amps

My opinion ( and that's all it is):
Let's say your bike draws 8 amps at 24v. (running at 1/4hp) That's 8 amps from EACH 12v battery, since they're in series. 8 amps for 1 hour = 8 ah. 8ah is almost depleting those batteries.

If you keep your ride time to something under one hour, you might be ok. Even then, the life of those batteries will be cut pretty short.

If any of this is wrong, I'm sure it will be corrected.

Hey somebody who can speak English! I can almost understand this one. The current lead acid batteries have 10 amp batteries also. So does that mean the batteries in my link should be at least just as good?

Electric bikes are a lot different than electric cars in how you use them. Most of your locomotion is done by pedaling. (After all we can't be too lazy) You use the electric power to give a boost up hills, or maybe help into headwinds, or if you stop suddenly without having a chance to gear down, the electric motor is nice to get you back up to speed. So if you have a battery that will get you 10 miles at 15 miles per hour with zero pedaling, that's only 40 minutes of run time. But using it just as a boost, that means you'll likely have a range of 30 or more miles with several hours of run time.

When the lead acid batteries were new and we did use the bikes, I ran out of juice and rear end capacity before the batteries ever did.