How much is the battery charger and tester worth?

This unit cost about $50 more than their base unit. But it includes 2.2 pounds of nickel plated strip and a built in battery tester and charger with alligator clips. If you endeavor to do real work with 18650 lithium batteries you should be able to test and charge them - with alligator clips for flexibility.
Battery chargers and testers is not something I seek to study a lot at the moment. Too many eggs to fry already.
https://www.amazon.com/Mophorn-Battery-Soldering-Portable-Batteries/dp/B07SYLH84B/ref=sr_1_24?dchild=1&keywords=spot+welder+battery&qid=1596122721&sr=8-24#customerReviews

Battery chargers and testers is not something I seek to study a lot at the moment. Too many eggs to fry already.
https://www.amazon.com/Mophorn-Battery-Soldering-Portable-Batteries/dp/B07SYLH84B/ref=sr_1_24?dchild=1&keywords=spot+welder+battery&qid=1596122721&sr=8-24#customerReviews

First Bank:16 180 watt Grape Solar with FM80 controller and 3648 Inverter....Fullriver 8D AGM solar batteries. Second Bank/MacGyver Special: 10 165(?) watt BP Solar with Renogy MPPT 40A controller/ and Xantrex C-35 PWM controller/ and Morningstar PWM controller...Cotek 24V PSW inverter....forklift and diesel locomotive batteries
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My own little bit of testing and such... I have a charger (for single round NiMH and Lithium cells) that can test batteries (capacity measurements and internal resistance)... And, for me, the big issue has been self discharge.
And for me, the tester did not really do say anything about the battery's ability to keep a charge (for at least one year and 80% State of Charge), vs dying in weeks or less.
-Bill
Been watching a lot of podcasts. Have not seen anything about measuring the self discharge rate.
Keep them cool if possible - we all know that.
Edited - meant packs, not singles.
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-Lister ,
https://www.amazon.com/gp/product/B07DKD3LRF/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
NiMH batteries... They did not hold any charge past a year or two... The low self discharge NiMH batteries (such as Eneloops) do hold at least 80% of their charge after 1 year IMHO.
The low self discharge NiMH batteries are sometimes labeled as "precharged" batteries for other brands.
-Billl
I guess it's been 2 years now and they are working fine, the first sett came with broken cases and they replaced the 2 batteries. I put the battery packs into old DeWalt or off brand cases and had 4 batteries, I've miss placed one but the other 3 are working well.
What started as a simple quest to rejuvenate expired tool battery packs has expanded more than anticipated. There are both exciting possibilities and daunting challenges.