Recent content by Riles

The answer was given in a few posts, but after reading through all of them I'm not certain that it was totally clear so I just wanted to make it clear before OP pops a fuse trying to charge things. Short answer- yes you can charge through the 4s and the 6s balance leads, but only if the...

Just to provide a progress report- this has taken much longer than I had hoped, but after much trial and error I was able to cobble together a usable 16s pack that has a capacity of ~30ah at a 10a discharge. I tried using the method of grouping them all together in parallel but it wasn't...

That's a good point- if I connect the meter half way, I would just need to double the watt/hours. Good call on the draw of the meter too. The light bulb method was my original plan- I bought 10x 12v 50w bulbs for about $10 on amazon. I wired them in parallel to give 500w draw at 12v (only...

I'm a bit confused- wouldn't a space heater only be drawing it's design power under this scenario? My space heater is 110v and my battery array will be somewhere just under that; the heater is spec'd for up to 12a AC (1500w on "high"). Is it because DC is harder on the switches than AC...

For the charging, I think I'll just stick with the hobby charger since I can't be there to monitor the charge process and it's so good at administering the CC/CV algorithm. It's about 70 watts if I use all four channels so not terribly slower. Plus I also already have it so I'm being lazy...

That makes sense. Right now I'm still only about half-way through the first charge cycle doing one cell at a time. As far as charging all in parallel at the same time, my charger only has the ability to output 5a per channel, so it would take about 7 days of charging to do all 32 cells in...

I just acquired a 16s2p lifepo4 pack basically for free. It consists of 32 40ah Mottcell lifepo4 cells. Here is the catch- a balancer was attached to these things for the past year while the kit was sitting on the shelf, meaning they are all at absolutely 0v. My DVM reads to the thousandth of...

Hey guys and gals, I just wanted to chime in and share my experiences with Ping. He runs one of the best businesses I've ever dealt with so I felt everyone should get to hear my experiences with him and his batteries. I ordered a 24v 15ah v2.5 battery in 2009 from him, and after a few quick...

Wow thats pretty cool. Probably better off with a 24v/10ah ping pack for $270 shipped w charger, but it would be great if somebody also needed the outer shell.

Safe, I admire that you are sticking to your guns with these cells. I'm in the same boat- I want to buy meters, sensors, analyzers, etc. But there are so many things in my life that take precedence, even if its just another pair of SLA's. A true enthusiast does not need a sensor to tell him...

Sorry to be a bother, but have you had a chance to test any other batteries?

Wow, this is great. I have been waiting for somebody to do this! I was actually toying with the idea of buying some test equipment and doing it myself a few months ago, but then work got busy and, well, here we are. I am an avid rc modeler, so I have always been interested in the price point...