NEVER BUY 312 HEARING AID BATTERIES EVER AGAIN.  JUst $69
With 4 batteries you can use one and charge the other 2 batteries.
Small enough so the charger and batteries can fit in your pocket.

312 battery can use 12-16 hours. The working time depend on the device working current 。it usually charging 4 hours the light will turn green, but charging 6 hours is better. It can charging completely full.

About this item

  • Package Include 2 pieces of Size 312 Rechageable Hearing Aids Battery
  • Fit Rechagreable Battery Size: 312 / 13 / 675 , Although The Charger Can be Applied to Battery Size 13 & Size 675, These Two Types of Rechargeable Batteries are not Included in the package
  • Power Inspection: When the Battery is Placed in the Battery Detection Position and a Light is On, the Power is about 20%. When the Two Lights are on, the Power is 80% or so.

Note:
When your charging our battery via our charger , please use OUR USB cable and please connect adaptor(5v,1A) to charge, you need to charge it 5-8 hours at least for full charged. After full charged ,it could last Up to16 hours  (Shorter or longer depends on your hearing aid power consumption)