Amazon.com: Synergy Digital GPS Battery, Compatible with Becker Traffic Assist Pro GPS, (Li-ion, 3.7V, 1200mAh) Ultra High Capacity, Replacement for Becker 38799440 Battery : Electronics
GPS Battery for Becker HJS 100 HJS-100 Map Pilot 338937010208 HJS100 604808025458 | eBay
AKKU GPS BE3: GPS navigation battery for Becker Traffic Assist, 720 mAh at reichelt elektronik