This is my first battery pack I've opened. Black N Decker 20V 2AH

20V MAX* Compact 2Ah Battery (2 PK)

20V MAX* Compact 2Ah Battery (2 PK)

20V ULTRA Li-Ion Cordless 4-1/2 in Angle Grinder – MOTORHEAD

V20* Cordless Random Orbit Sander (Tool Only)

20-volt Lithium Ion battery pack for 33% more run time The Power drive transmission delivers more power from the motor to the cutting string so you

BLACK+DECKER 20V MAX String Trimmer, 12-Inch with Extra 4-Ah Lithium Ion Battery Pack (LST300 & LB2X4020)

20V MAX* DEWALT POWERSTACK™ 5Ah Battery

20-V 2 Amp-Hour; Lithium Battery

BLACK+DECKER 20-V 2 Amp-Hour; Lithium Battery

2-in-1 cordless trimmer and edger cuts along borders, sidewalks and flower beds and easily converts between trimmer and wheeled edger. Trimming areas

BLACK+DECKER 20V MAX Cordless String Trimmer, 2 in 1 Trimmer and Edger, 12 Inch, Battery Included (LST300)

DEWALT 20V MAX XR Brushless 1/2 In. Compact Drill/Driver Kit with

Black+decker POWERSERIES+ 20V Max Cordless Stick Vacuum

BLACK+DECKER 20-Volt MAX* Lithium-Ion Cordless Drill With 2