Reputable BL-5C battery brands?

Batteries and Chargers Rechargeable Batteries
10

April 23 2019 I bought a cell-phone battery from Subtel GmbH (D) to replace a Nokia BP-5M.
Barely 21 months old now, and it already starts bulging. BEWARE

Clues written on it are:

model CS-NK5M,
(make?) SLX-Longer,
(trade?) Cameron Sino.