Hilti B22: rebuild or buy a new battery — which is worth it?
When your Hilti B22 battery holds less and less charge, you have two options: buy a new pack or rebuild the one you have. In most cases a rebuild is cheaper and just as durable — as long as the housing and contacts are sound. Below we compare the two.
Quick comparison
| Rebuild | New battery | |
|---|---|---|
| Cost (B22 5.2 Ah) | from ~€65 | much more |
| Capacity after | full, new cells | full |
| Compatibility | original housing & BMS | original |
| Warranty | 12 months | manufacturer's |
| Environmental impact | less e-waste | new waste |
When a rebuild is worth it
A rebuild is the best choice when the tool works fine and the only problem is short runtime on a charge. We replace all the cells with new ones (Samsung / LG / Sanyo), so capacity returns to factory level while you keep the original housing, electronics and full compatibility with your charger.
When a new battery is better
If the housing is cracked or the contacts are burnt or mechanically damaged beyond safe repair, buying a new pack can be the more sensible choice. We make that assessment during diagnostics and tell you honestly when a rebuild doesn't make sense.
Durability after a rebuild
New cells from reputable makers last comparably to factory ones. What matters is reprogramming the BMS and calibrating it to the new pack — this keeps the charge-level readings correct and the pack running stably. We back the result with a written 12-month warranty.
FAQ
- Does a rebuilt battery work like new?
- Yes — after replacing the cells with new ones, capacity returns to factory level, and the reprogrammed BMS ensures correct readings and stable operation.
- Is a rebuild always worth it?
- Almost always, when the housing and contacts are sound. In case of serious mechanical damage to the housing, we'll honestly advise buying a new pack.
- Do I need a new charger after a rebuild?
- No. We keep the original electronics and contacts, so the battery works with your existing Hilti charger.