On Order Utstarcom Mobile, Smartphone Battery Li-ion Battery fits Utstarcom, adr-2100, adr2100mvo 3.7V, 1300mAh CS-AU2100SL $28.53 All our batteries are brand new, The battery is an equivalent battery to the manufacturers as shown below. They are made with premium Lithium Ion cells and are rated as shown in the specifications. Contact us if there is any questions as to the fitment of the battery for your device its better that you do this before you order as return shipping if you... Add to cart