The 588Wh Li-Ion Battery-Pack from Motion FX Systems is a spare battery for the ThunderPack portable DIT stations. It includes six 98 Wh batteries packed together with six yellow protection caps. This battery pack can hold a typical ThunderPack RAID running for more than six hours. You can hot-swap batteries with fresh ones, one pair at a time, without the need to switch-off the system. The battery pack is built in US and is certified for air travel according to TSA & IATA regulations.