Bruce;
I found your post ironic.
I just got back from the P.O., having sent you a package and I included a letter about some of the batteries I've been messing around with.
The only Werker's I've run across have always been toast. I've always wondered how good they were because if you have a Batteries Plus nearby they'd be easy to get.
The few reviews I've seen on them usually seem to be 50/50 good/bad.
And yes... they're certainly heavy. A friend has a Crystalyte hub motor running on 72v. I think he has 12ah SLA... 6 of those and that bike is heavy. As heavy as it is, that sucker still goes over 40mph.
Ironic also, I found a B&B in a Black&Decker string trimmer someone was tossing. I don't know how old it is but it still holds a pretty good charge. I'm waiting for a reply from B&B on how to read the date code.
On Sunday a friend brought over a APC Back-Ups Pro 650 that a client wanted out of her attic. It was left there by the previous owner, has an inspection sticker on the bottom from 2003, but I have no idea how long it was in the attic, not plugged in.
It wouldn't turn on and upon opening the battery door, I found the negative lead of the battery (1-CSB GP 12120/12ah) disconnected. The battery was around 3vdc and once I hooked the negative back up the USP started but was flashing a red light for a bad battery.
I yanked it out and stuck it on a charger and although I haven't done a load test, it appears to be pretty healthy.
Both of the Schwinn scooters I've bought have had Enduring brand batteries. The first had the set that was basically zero volts. Those are the ones I finally brought around by short reverse charges.
I sold that set of batteries along with a rebuilt scooter to the neighbors and it looks like the batteries are still going strong.
The other scooter came with 2 sets of batteries, both Enduring, and those seem like pretty strong ones also.
And last but not least, the Currie mountain bike had a set of Enduring in it also. I don't know for sure but I think that bike was abused pretty well then left to sit for quite awhile in a basement and those seem to be good batteries too.