Batteries can drain while in storage so users can take them out between uses. Also be sure to store ear buds in a low humidity environment. Battery draining faster in one ear over the other could be due to one directional sound causing one to work more than the other. The primary use for the silencer ear pieces is for suppressing loud sounds, not for carrying conversations as with using these as a hearing aid.
EASY TO CONTROL - Integrated Omni directional microphones and full dynamic range speakers deliver a crisp clear sound; The speakers feature independent volume control and an off/on switch
COMFORTABLE FIT - Walkers Silencer Compact In-Ear Buds are designed to stay in place without disrupting your activities or your firearm. They include secure sizing fins in three different contoured sizes, along with foam buds, to ensure a snug and personalized fit.
HEARING PROTECTIONS EARBUDS - Walker's Silencer Digital Earbuds are an in-the-ear-canal device that both amplifies low-level sounds so you can communicate on the range, and suppresses harmful sounds to protect your hearing
NOISE REDUCTION - Silencer Ear Buds provide NRR 25 dB (Noise Reduction Rating) protection against gun blasts through SAC (Sound Activated Compression)
DETAILS - Walker's Silencer Digital Ear Buds run on two #10 batteries (includes 4), and come with a removable lanyard and a carry case for easy transportation