Important! Please note this charger is only compatible with Makita 40V Max XGT tools ALL other Makita tools are NOT compatible. Makita DC40RB 40V MAX XGT Li-ion Twin Port Rapid Battery Charger The Makita DC40RB twin port rapid charger has been designed specifically for XGT 40v Max Li-Ion batteries. The charger is also suitable for fast charging LXT 14.4v and 18v LXT batteries when used with the optional charging adapter ADP10 (sold separately). When the battery cartridge is inserted, the charging light turns blue instead of green, and charging begins. The fast blue flashing light indicates a charged condition of 0-80%, while the blue charging light illuminates steadily to indicate a charge of 80-100%. The indications are approximate and may vary depending on battery temperature or.