PROHEAR RLB01 Rechargeable Li-Ion Battery Pack for Peltor Sport Tactical 300, 500 and 3M Worktunes Wireless Hearing Protectors (TAC300, TAC500, 90542), 1 Pack

I bought one of these for the Peltor Sport Tactical 500 muffs, and it seems to work just fine - but the earmuffs are supposed to switch from a blinking light to indicate charging to a solid light to indicate fully charged - the light just always blinks - even after I left it charging overnight - I used the muffs for several hours the other night and they work fine with this battery - no idea how long it will really last - they say 80 hours - it is unlikely I will ever wear them 80 hours in a row - and I will just charge them every couple of weeks

The device is used to power a noise prevention headset set that is also blue tooth capable. NO problems with the headset: easy to install, quick to charge, maintains charge over several trips to the pistol range.

Charged up the first time in my 3M radio earmuffs, and ran a couple days just great. Then didn't seem to charge up again, charging light didn't want to come on, seem to have voltage at the battery pack, but not sure if it's the charger or an issue with the pac.

The Peltor 500 eats batteries. Must be the bluetooth. I love the ears though! The rechargeable should reduce the "replace battery" prompt!

Fits as designed.

still waiting to see how long it last on a charge

When I received the battery it worked fine then after a day it started to say low battery so I charged it. The next day fully charged would not function at all and would not charge.

I purchased for a peltor 500 hearing protection. Did not work for mine. Called peltor and they will not honor for the hearing pro They said not approved battery,,,