WATSON Universal 8-Bay Charger Owner's Manual - page 13
Manual is about: for AA/AAA/C/D/9 NiMH & NiCd Rechargeable Batteries
of
16
Do not operate the charger in an environment
with temperatures higher than 104¾F
(40¾C) due to the risk of electrolyte leakage,
overheating, and battery damage.
It is normal for batteries to become warm as
they charge or discharge.
If electrolyte material touches your eyes,
immediately wash your eyes with running cold
water, and seek medical attention.
Please recycle dead batteries, and preserve
our environment.
Safety Instructions 12