Replacement Battery for Small VoiceBooster & Aker Voice Amplifiers This battery works with all VoiceBooster/Aker 10watt model including the MR1506, MR2506, MR2601, &amp; MR1508. The VoiceBooster brand is owned by TK Products, LLC. Each VoiceBooster product comes with a 6 month parts and Labor Warranty that is serviced by TK Products, LLC. The VoiceBooster must be purchased through TK Products or one it's authorized dealers for Warranty Claims to be honored. Buy with confidence!