I have been charging my batts through my 396t for several years now, but after reading this thread I'm seriously considering buying a charger. it would be much more convenient. I am curious about " destoying a scanner by charging through it" why / how does that happen?
The failures are quite rare, so I wouldn't worry about it. Sure, it
can happen if an internal component just up and dies or if a battery manages to leak its guts, but it just doesn't happen very often. If it did, we'd all know about it.
The valid reasons for using a good external charger include:
- ability to recharge cells in one to two hours
- ability to properly charge cells (no overcharging)
- ability to do periodic break-in cycles
- ability to periodically fully discharge cells down to 0.9V
Not killing your scanner really doesn't belong on the list.
I did some looking through old posts here and it seems the two main chargers people like are the Powerex and LaCrosse products.
The LaCrosse's lower price is attractive, but it matches the device's cheap hardware and firmware. You get what you pay for, and with LaCrosse you get marginal MOSFETs, sub-par battery contacts, missing filter caps and microprocessor lockups that lead to total destruction of batteries and the charger itself.
How many links to meltdown failures are on this page?
LaCrosse BC-9009 / BC-900 - The Melt-Downs Continue... - CandlePowerForums
And that only covers a few months in 2009-2010. There were so many reports, Amazon suspended sales. That should be enough of a red flag for most consumers.
You can reduce the odds of a meltdown by adding the missing filter caps and a cooling fan, plus always running from a clean UPS supply, but you can't fix the way the LaCrosse physical design jams your warm cells together, unlike the Powerex and its air gaps, both under and around each cell. Nor are you likely to fix the problems with the LaCrosse battery contacts.
I like the per-cell dedicated displays on the LaCrosse, but the charger's design and implementation are sorely lacking. Powerex, on the other hand, have better designs and components, and their reliability reflects that.
Photo: Typical destruction of cells and LaCrosse charger. More meltdown photos at the above link on pages 2 and 6; cooling hack photo on page 3 (many users report that the compact design has poor airflow and runs too hot); melted battery contact on page 5.