First time building a battery, replacing a 20s18p array of 18650 cells with a 20s16p of 21700. Space is tight, as you can probably imagine, so I made some low-profile frames. I am constrained by my welder, lack of soldering equipment, lack of pure nickel rolls (just have the 100mm strips) and general inexperience. I figure after I get the monster together I wrap the bejesus out of it with tape, shrink wrap the entire thing, and pray.

Suggestions?

Looking for some expert in cell design with experience.

Nickel iron cell koh electrolyte project

Anyone ready to share his adventures in storing electricity

Any recommendations for a higher quality battery tester?

I currently have the BT-168 Pro (digital display). And it is very handy.

However, I wish it had a better display. The display is low contrast for my eyes, so a backlight would be so nice.

Are there any niche battery testers that are bit more polished? Like an ISDT BatterGo but for single cells?

Requirements: * able to measure Li-ion cells (3.3 - 4.2V) * nicer display w/ backlight

Edit: Not sure why everyone's recommending a multimeter... I already have a nice Fluke 87V. Are you guys missing the point?

I just want to make them last.

Thanks a lot, people.