Green Cell Speaker Battery EU-BT00003000-B for TDK Life On Record A33 A34 TREK Max - EMP.ee - Electronic Marketplace
TDK Life on Record A33 Battery Replacement - iFixit Repair Guide
HQRP Kit AC Adapter and Battery compatible with TDK A33 A34 Life on Record Wireless Weatherproof Speaker A-33 A-34 Portable Rechargeable Power Supply PSU Cord Mains Adaptor Charger + Euro Plug Adapter
DuB-EnG: Hack a Bluetooth Boombox TDK A33 retrofit with re-purposed Lithium Ion laptop batteries BMS - YouTube
TDK Life on Record A33 Battery Replacement - iFixit Repair Guide
TDK Life on Record A33 Wireless Weatherproof Speaker review: An impressive, modestly priced Bluetooth speaker - CNET