The BP-L2 Battery Pack from Tascam is an additional/replacement battery for the company's DR-1, DR-100, DR-100MKII and GT-R1 portable audio recorders.
The Tascam BPL2 Lithium-Ion Battery Pack lets you record approximately 7 hours in MP3 format using the internal microphones (varies with operating conditions). The Tascam BPL2 is rechargeable.