A popular battery strapping tensioner BT-DD19A  up to 19mm 

This battery powered strapping tensioner BT-DD19A , is using for plastic sstraps . manually use strap feeding device to wind the plastic strap around the box,bag, pallet . 
straps end is inserted into strapping too and automatically tensioned , separate after friction adhesion . 

Advantages:

Easy to use, the fuselage and lighter；
do not need buckle,frication hot connect，Beautiful and solid interface
Mobile and convenient, suitable for a variety of venues, large packets are applicable；
Body and component adopt high strength alloy materials and engineering plastic, durable；
Safety performance is high；
With no plug power, switch power supply is connected, relay disconnect the battery power supply.Without external power supply is powered by batteries。