A123 lawn mower...

[zeropointbug]

Hey guys, I just wipped out my electric lawn mower(24volt) that was bought two years ago, the batteries(Pba) were such shit in it that it could only be used for about 1/2 of it's charge (cuz the voltage curve was poop). One full runtime was about 25 - 30 mins, and you have to walk slower to cut the grass compared to my other 5hp push mower which will cut through pretty anything up to 1 inch trees! lol

Anyways, I threw in an 8s1p A123 pack and viola, spins right up with more power than the big dual 12v/17Ah lead acids that were in there. I went to cut the grass, and I got exactly 4.5 minutes of runtime and then instant dead. Took the pack off, pretty warm (thats 15C discharge)... so i charged it back up again right away and went again. (I'll have to admit, it looked pretty darn funny cutting the grass with this tiny little battery sitting on the mower. lol)

I hooked up the Eagletree the second time around and the results are:

Voltage idle state: 28.2 volts
Voltage when plugged into mower: 23 volts
Amperage: ~30 amps
Watts: 650 watts

I am thinking about making an 8s6p battery for this thing. That should be good for 25 - 30 minutes of runtime. The power output should higher too as the voltage should be somewhere more like 1000 watts peak.

Anyways, I thought i would share with you guys, kinda silly to post it here, but oh well. If you have any better solutions, I'd love to hear them. The motor is kinda low on power, so if you knew where to get a '2hp' electric DC motor (24v) for less than $200, please let me know.