OK, I finished the battery testing, now I'm back to typing with both hands.......
This new battery tracks with all the rest. Full charge (to solid light) gave 2 'top open step 7' sessions on the top LED. Then one each on 6, 5, 4 and so on. The ninth such test session started with no LEDs showing but was otherwise normal. I've done this test on several batteries and several Solos. Including swapping parts (the luxury of having more than one available). I think it's a pretty valid test. A well charged battery in good shape should do at least 7 such sessions IMO.
If yours will only do 5 or 6 you're on borrowed time. It'll go downhill fast from there most likely. Have a plan.
As long as we're on Solo charging and other issues, here's an observation I've been sitting on for a bit lest I set off a rash of 'charger envy'. I've said a couple times before that Solo doesn't use all of the 1000mA the charger can supply, more typically about 800. There seems to be quite a spread, actually. And it's largely related to the Solo, not the battery or charger. The highest (fastest charging) one I have here is about 820mA (it varies with voltage some), the lowest about 640 or 650 under the same conditions (charging from my test rig at about step 4). This means some will recharge in 90 minutes while others take two hours for the same recharge. It may be just normal variations or a shift in programing (design change)?
In other charger news, my 'watch the top LED come on and stop the charge automatically' kluge is running well. I should probably take some photos of it, it's fun and IMO useful but not all that practical yet. There's also another approach I plan to try. Normally the charge controller runs at maximum (for that unit) current until it gets close to the full voltage at which point the current is tapered off. It drops to 100mA or so before the light goes solid ending the charge. This is basically from the time the top LED comes on forward (when we'd like to stop). I'm thinking there's a compromise value, say 350mA, that can be used to terminate early without the trouble of trying to look for the light from the top LED. A small box, like Pipes AIO PA between the charger and Solo should do it. Another Solo project to look forward to. Cool.
Solo is a neat little vape, even before we geeks (should that be 'us geeks'?) get to playing around. No home is complete without one.
And a spare.
Regards to all, my kluge just beeped at me, the Solo is ready again.......science calls.
OF