40 varta micro battery size 312 batteries on the battery card label with tweak brand, zinc air, mercury free hearing aid and sound amplifier batteries. These are powerful, yet small and economical. With normal full; time use, the battery will last approximately 5 to 7 days. Varta hearing aid batteries are manufactured in Germany.
**G
Just the Best.
Most powerful, long lasting batteries I have ever used. Just the Best.
Trustpilot
2 weeks ago
1 week ago
