BOSCH Increase Battery Capacity BAT411 to BAT420 - YouTube
6800mah 12v Li-ion Bat420 Replacement For Bosch Bat411 Bat412 Bat413 Bat414 10.8-volt Max Battery Cordless Power Tools - Rechargeable Batteries - AliExpress
Amazon.com: Synergy Digital Power Tool Battery, Compatible with Bosch GSR 10.8 V-LI-2 Power Tool, (Li-ion, 12V, 4000mAh) Ultra High Capacity, Replacement for Bosch BAT412, BAT414, BAT420 Battery : Tools & Home Improvement
Amazon.com: Powerost 6Ah 12V BAT420 Battery Compatible with Bosch 10.8 Volt GBA12V30 BAT411 BAT411A BAT412 BAT412A BAT413 BAT413A BAT414 D-70745 2607336013 26073360 : Tools & Home Improvement