Recent content by wakataka

My battery is still going strong also, after about 7 months of use. I'd guess that it's probably got between 120 and 150 cycles on it by now. I've never run it down very far. My normal commute is about 6 miles round trip and takes a little over 2 ah out of the battery. Peak watts are often over...

I've installed and know the history of 4 WE kits, one BD-36 and 3 BL-36. Overall, I think the WE kits are good value for the money, but you need to plan on doing some tinkering and troubleshooting to get them working right. All 4 of the ones I've installed badly needed the wheel trued up before...

Below are the data I've got so far from my WattsUp. The columns show miles ridden, volts at the end of the ride, amp hours, watt hours, amps peak, volts minimum, and watts peak. You can get a rough idea of the voltage sag at peak amps by subtracting the volts minimum from volts at the end of the...

The dimensions of my battery pack are L=275mm W=135mm H= 90mm. It was a custom size made to fit the WE battery bag. It fits with plenty of extra room. I'm not sure what the dimensions are on their standard battery packs. I've got about a dozen shallow cycles on it now and it's still performing...

Dogman - The cells are LiFePO4. They sent me a draft catalog and promised to send a more complete one when it is final, which I will upload. They have pouch cells rated up to 230 ah. Here's a segment from the catalog, listing specs on pouch cells. Capacity C-Rate Lifecycle Impedance (Ah)...

Dogman - I corresponded with Serena Fan at BMS battery and she tells me that all their E-bike batteries use pouch type cells. So the 48v 11ah battery has 16 11ah pouches. Even their "little frog" battery that hangs off the back of the seat post reportedly uses pouch type cells. The thing...

Russel - My WU is not mounted where I can see it when I'm riding, but it records the peak amps and the minimum volts. With a limited number of readings (3) so far and not pushing the pack hard, I'm seeing peak amps just over 20a and minimum volts just over 49v. These readings are on rides where...

I cant tell what type of cells are in the pack. It's completely sealed up. It was curious to me that they offer both an 11ah and a 12ah pack. They said that they could reconfigure the 11ah pack to fit the WE battery case but not the 12ah. The resting voltage on the pack is around 53.3, which...

If the battery holds up over time, it will be a good deal. I'll keep the forum posted as to how it performs.

I recently purchased a 48v 11ah lifepo4 battery pack from BMSbattery (http://www.bmsbattery.com/), which is the online store for E-city Power. I used the online chat session to work out the details of the order. I wanted a battery to fit in my Wilderness Energy cloth battery carrier. They worked...

I'd go with the 48v. I have both 36 and 48v SLA packs. I find I don't use much more Wh/mile with the 48v pack because I generally just cruise at 20 - 25 mph and I don't need full throttle to do that with the 48v pack. But with 36v I run near full throttle on the flats and need to downshift on...

I've got some data on three different WE kits that I've run over the past year. I've got a BD-36 and two BL-36 kits. I've run them all on both 36v and 48v SLA. There seems to be measurable differences between two different BL-36 kits. The kits appear identical in every way. The differences are...

I wouldn't buy another Soneil or Cansai charger. I've had 3 of them fail in the past 6 months. I bought one of these off of E-bay...

Snowcrow - The deslufator I've got draws about 70 miliamps from the battery. I don't see how it could affect the water content of the battery with that low a current draw. Unfortunately, I bought my desulfator before I had my WattsUP meter to be able to accurately assess the condition of my...

I have an SLA pack that I bought used back in July. It had not been treated well when it was in use (allowed to run down before being charged) and had been sitting with a partial charge for months. It still worked, but was noticeably weaker than my new pack. I got a little 36v desulfator off of...