Topcon DB-74C Charge Adapter Battery Tray | Superior Instrument
Amazon.com: PK Power Car DC Adapter Compatible with Topcon AD-15 AC DC Converter DB-74C Battery Holder Fits RL-H4C RL-SV2S RLH4C RLSV2S (BT-74Q Rechargeable Battery Pack) Long-Range Self-Leveling : Electronics
CJP-Geek AC / DC Adapter For Topcon AD-15 Converter DB-74C Battery Holder Fits RL-H4C RL-SV2S (BT-74Q Rechargeable Battery Pack) Long-Range Self-Leveling Construction DB Rotary Power Supply Cord Cable - Walmart.com
TOPCON BT-74Q RECHARGEABLE BATTERY FOR RL-H4C,RL-SV2S LASER LEVEL,313680404 | eBay