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Motorola HKNN4013A, also known as the BT90, is a compact, high-capacity, Li-Ion (Lithium-Ion) 1800 mAh battery for portable two-way radios.
This is a micro-USB, rapid-rate wall charger designed to charge your wireless accessories.
With this tri-unit charger, charge your SL series radio, a spare battery and your operations-critical wireless accessories all at the same time.