CSB GP series batteries

The three most common mistakes when replacing small batteries

Mistake one: checking the voltage but not the terminal. A 12 V battery may have F1, F2 or another tab width. If it does not fit, the money is spent for nothing. A photograph of the label settles it in seconds.

Mistake two: treating Ah and W as the same thing. "28 W" and "7.2 Ah" both look like numbers, but they are capacities on different bases. Convert on the wrong basis and you can buy a battery that is clearly too small — and end up with less runtime than you started with.

Mistake three: replacing only the failed block. In a series string, the weakest block sets the performance. Replace one and you have mixed old with new; the new block never reaches full charge and the problem returns quickly. Replacing the whole string from one batch is the cheaper approach.

Our replacement service

1. Confirm the specification — send a photograph of the label or the UPS model and we check voltage, capacity marking and terminals.
2. A site visit to measure — confirm replacement is really needed; sometimes it is a UPS setting or the load.
3. Whole-string replacement — same brand, same batch, no mixing.
4. An actual discharge test — measured runtime after replacement, with the figures handed over.
5. Old battery collection — disposal that meets the environmental requirements.

The battery is not the most expensive consumable in the system, but it is the only part that makes a UPS fail at the moment it is needed. It is worth handling properly.