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I just bought a NiMh charger from Powerstream. I'm pretty happy with it. I bought the 48V, 2A, model. So far, I've tested it with 35 cells (42v), and 30 cell (36v) packs. Worked well for both.

I read that thread, and I'm trying to think through the process. But I'm still a bit confused. I assume when you charge, the direction of the diodes must be reversed. Otherwise, nothing would happen. This means you can't hardwire the diodes in place because you have to change them between...

I guess the main reason I don't want to use a diode is because I want to charge in parallel as well. I don't suppose there is a way to do that with diodes.

I was also thinking about getting a recumbent bike. The regular diamond frame bikes are just too painful to ride in my opinion. I ended up getting a Rans "crank forward" bike, which I highly recommend by the way. Not as comfortable as a recumbent, but pretty close. The reason I choose it over a...

Is this what is happening? With two packs connected using diodes, which ever pack has the higher voltage will be supplying more current. This continues until the voltage of the two packs are about the same, then the current draw will be 50/50. I can see if you connect two different types of...

I saw this thing and it got me thinking. http://www.ebikes.ca/store/photos/Diode25A.jpg I plan on having two battery packs connected in parallel. But I was just going to plug them together. What is the purpose of connecting them through a schottky diode? I don't really see any reason for...

My bike with the Crystalyte conversion weighs about 55 lbs. I know the BionX has a lighter motor. Maybe 4-5 lbs. I don't think electric bikes can get much lighter than 50 lbs. As for the look of retro-fit kits, I think my bike looks much better than the ebikes out there. I don't think most...

You should look into the Crystalyte kit. They are a lot cheaper than the BionX. You don't get as many fancy features like regenerative braking and different levels of assistance. But I find just having throttle control is pretty good. I bought a Crystalyte 408 motor and a 20A controller. With...

I think I might have lucked out and not damaged anything. I put a POT in place of a thermistor and slowly decrease the resistance til the charger stopped charging. The resistance of the POT when this happens is around 3.1k. That's about 50 degrees for a 10K thermistor.

Thanks. The charger seems to be working now. I don't have any thermistors at the moment, so I had to trick the charger with a 10K resistor. My only concern is, before finally getting the wiring sorted out, I was messing around with it and hooked up the yellow as the positive. The yellow has 5V...

Is there any particular adhestive I should use for attaching a thermistor on a battery pack? I assume I need something that conducts heat well.

I decided to give it a try and got the charger. But I’m a little confused. The battery plug that comes with the charger is different than what I need, so I have to put a different connector on. But I don’t know what the color code on the wires mean. I’m hoping someone here might. The three...

I’m considering getting a charger from Powerstream and have been checking out the specs of their 36V and 48V 2A NiMh charger. Both chargers use thermistors to detect peak charge, and does not check for voltage drops in the pack. Both chargers have a peak voltage output of 56V and a max power...

That's a good point. But I'm just wondering what they could do with a copy of your credit card. Don't they already have all your credit card info from placing your order?

I saw that tread. I know powerstream usually ship with UPS. And I know UPS charge a ton on brokerage fees to canada. They can use other methods of shipping, but you have to specify in writing on your order. The other thing you mentioned, that they require a copy of your ID and debt card before...

I use to race RC cars so I’ve had a lot of experience with sub C. It was long enough ago that we didn’t have NiMh, just NiCd. I also think that the RC industry has sped up sub C development over other cells. I remember draining a 1700mah pack in 4 mins. That’s over 25A average. Your average C or...

I agree that higher discharge rates will decrease a batteries capacity. But a lot of the sub C cells were designed for high discharge rates and a lot of companies show graphs of the cell’s discharge characteristics at 20A or 30A. Some good cells even exceed their ratings at these high discharge...

I think my experience with Tenergy sub C cells shouldn't scare you off of all sub C cells. I still plan on using sub C, just ones that meet their ratings. I only paid $2 per cell, so I guess I shouldn't be too shocked that they don't do what they claim. I think $4-$5 a cell should get you...

Thanks. I'll be sure to avoid the batteryspace chargers. I think I'll either get a charger locally from ebikes, or order one from powerstream. At the moment, I'm still not sure the number of cells I want to run. I was planning to do 35 cells. My defective charger was suppose to be able to charge...

I'm the type of guy that usually researches everything before I buy it. But when it came to choosing NiMh cells, I went out of character and just bought the cheapest cells I could find. For some odd reason, I actually believed their product description. I came across the site allbattery.com...