Ansmann Standard Li-Ion Battery Packs - Ansmann 2447-3049-02, The Ansmann 2447-3049-02 is a Standard Li-Ion Battery Pack that is based on common standard cells.The rechargeable battery pack has been UN-Transport test approved (UN 38.3). This battery pack has been designed and manufactured by Li-ion battery experts at Ansmann, and is pre-wired. The battery pack is ideal for use right away, making it perfect for projects which need lightweight power without needing to make a custom battery. Ansmann 2447-3049-02 Battery Pack Li-ion 2S2P 7.4V 5.2Ah Block