Trimble Aftermarket Batteries
Too bad they don't make a ZPM in that size.
I have used them for batteries from Leica, Sokkia, Trimble, Hemisphere, TDS, and probably a host of others for close to 20 years. You ship them your old battery, they fix it, and they ship it back. Highly recommended. They have both an American and a Canadian shop. Arthur has always answered my email within 36 hours.
You may want to explore a similar service in your area if all you want to do is replace old batteries (ie. you do not want to purchase additional batteries).
In cheap power tools, or old gear yes. But I am cheap too.
Recently bought two batteries for about $100, back up GNSS South S82-V, these are Trimble S8 style Li-on batteries. Branded batteries $350 EACH. The cheap are now in rotation with the newer GNSS South G1-s, as the performance is the same as far as tested.
We had a local battery re packer re cell a few years back, and they were rubbish, lower capacity mah, and poor fit where glued.
The firm I work for has almost no equipment budget, so unlikely to ever own Trimble/Leica equipment. I would not recommend cheap batteries in a decent total station, unless well tested.
We basically only use aftermarket batteries and cables for Trimble replacements. However, there are some items that have to come from Trimble, the battery pack for the TSC2 is one.
But for the cowbell, the R8, 5800, 5700, we use the off-brand.
The S6, we were just talking about it, the battery is 2007, 12years old, if you find out that the off-market ones work, I would be interested to know.
Some years back we bought some off-brand batteries for a Trimble R-8 receiver. They worked great for a couple months, then rather quickly wore out. Nothing truly bad happened, but they really were not worth the hassle in the long run.
I'm sure that you can get good quality off-brand batteries that will be as good as the OEM models but if you do they aren't going to be significantly cheaper. And if the are cheaper, they are probably the ones that failed inspection and testing coming off the line. Pass.