The Makita BL4020 (191L29-0) XGT 40v Max 2.0Ah Li-ion battery is equipped with an LED indicator that shows the remaining capacity of the battery. The machine also responds directly to the status of the battery.
Makita BL4020 191B29-0 40V Max Lithium Ion Li-ion 2.0Ah XGT Battery 2ah X 3
Makita USA - Product Details -BL4040
Makita 40V MAX XGT Lithium Ion Battery 2.0AH 2.5AH 4.0AH 5.0AH 8.0AH Original Battery BL4020 BL4025 BL4040 BL4050 BL4080
Makita USA - Product Details -BL4040
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Makita 40V Max XGT 8.0Ah Lithium-Ion Digital Communication Battery with Impact-Resistant Outer Case, Shock-Absorbing Inner Liner, and Four Bright Green LED Indicators : Electronics