Recent content by Judoka

My first pack build was with used cells. I selected them by the procedures outlined above and the pack has performed flawlessly for 2+ months now. My ezip was only getting 8 - 10 miles on the old SLA compared to 30+ miles I now get. Because I carefully selected the batteries, the pack stays...

They were advertised as new, in a box, in a static bag, batteries don't appear to be scuffed up or anything obvious. When I made the first post, I had only checked one battery pack because I intended on sending the remainder back to the ebay seller. The seller refunded my money and told me to...

Those are some good questions and I left much of that info out of my original post. My LVC is 3.0, the batteries at rest were 3.97, they were charged to 4.20 and placed on a 4 amp discharge per pair (2800 mah x 2 is 5600 mah) so 4 amps is below a 1c discharge rate. Charger indicated 2300 mah...

I just recently acquired some new 18650 cells from 6 new Asus battery packs. I just did a capacity test on them with my Hyperion charger using a 4 amp discharge test. The first pair only made it 35 minutes. This is terrible performance out of a battery rated at 2800 mah, my USED 2350 mah...

I just got a second batch of batteries and I'm hoping to improve on my next pack build. This time I should have enough batteries from the same manufacturer (Panasonics 2400 mah). My first pack is doing great (see a few posts up), but it took forever to test all the batteries. I think I've...

After hours upon hours of reading, I finally completed my first battery pack yesterday. I want to thank all of the regular posters on this forum for all your help. Here is a quick rundown on my project. - I disassembled approximately 30 battery packs, leaving batteries in pairs. -...

67spyder, I like your jig and that's a nice solder job, the only thing that caught my attention was the way you are connecting the batteries... it appears you are connecting them on the end, from the diagram I referenced in the above post that is not the ideal way to do it... unless I'm...

I'm done testing all my batteries and have a Resistance and Capacity testing done. My thoughts are to take the battery with the best capacity and pair it with the worst (but in the acceptable range) and continue to do that for my 12p groups. For example; A = Best Capacity and L = Least...

That's pretty sweet, I would love to see more pics of your project. They are even pink for your wife, I bet she loves that.... LOL :)

Here's an update on my battery testing, would like some feedback to make sure I'm doing everything correctly. My Imax B8 has a discharge function I'm using to test capacity, I have it set to discharge at 4 amps for a 1s2p setup. This works best for me because I can put a battery on...

Thanks for the tips on the ezip case, I will definitely follow those. In some of your earlier posts I noticed you were leaving cells in pairs, but a few posts up from this you mention you're testing at 3s2p. Are you re-soldering them in this configuration after testing pairs, or testing...

I was following a recommendation a few pages back from drkangel about charging to 4.2 for testing purposes. After testing, my plan is to only charge to 4.1v and not discharging past 3.5v. Admittedly, I'm hesitant to use any of the batteries that came from a pack with 2.x voltage without some...

I have a few questions pertaining to this thread in regards to Li-ion laptop cells and the Imax B8 charger drkangle uses. I checked all the voltages immediately after removing from the pack, organized into groups based on their voltage, etc... I left batteries in groups of 1s2p or 1s3p...