Ruby Electronics BCP-7000 Portable Bar Code Data Collector Laser Barcode Scanner Lithium-ion Rechargeable Battery Pack 1700mAh Li-Ion 3.7V 3.0V, 18mAh, Maxell ML rechargeable Lithium battery for SRAM Over 30 hours and more than 20,000 scans ST uPSD 8bit CPU 1 M Bytes SRAM 256K Bytes Flash memory (store program software, codes, fonts, constant data)