I have found the single cellog 8 that i have to be more accurate than my cheap chargers. So it's good for me.
As I've said many times though, I don't care about accuracy to .01v. I'm happy enough that however much my cellog is off, all 8 channels read the same compared to each other. So for my purposes, noticing if a cell is .05 off and doing something about one when it gets near .1 off, the cellog has been my tool to have.
Next time I have an order off to a place that sells em, I plan to buy several more.
One feature I really like, is that while bulk charging a pile of paralelled packs, you can put a cellog on the balance wires, and it will start beeping if a cell is overcharging.
So I want more of em, so I can put one on each pack as I charge 4 packs at a time.
THE LIPO RULES. NEVER ABOVE 4.3V NEVER BELOW 2.7V DON'T PUNCTURE
Ideal charging /discharging range for Lipo, 3.65v minimum 4.1v maximum
See battery technology section, FAQ thread at the top of the page for lipo noob info.