PCMCIA type I/II SRAM Pcard is designed with dual backup batteries design* and dual rechargeable battery design(130mAh)** for data retention.SRAM PC card is compatible with all known PCMCIA SRAM PC card applications. Packaged in PCMCIA Type I housing, Pretec SRAM card is available from 256KB to 16MB and supports an extended range of industrial operating temperatures (-40°C to +85°C). SRAM Card,the removable (replaceable) but non-rechargeable 3V lithium battery as the primary battery and an on-board rechargeable but non-replaceable battery as the secondary battery. Such design allows the replacement of primary battery without data loss adding to the digital signals which alert users of the need of primary battery replacement.
The dual rechargeable battery in SRAM PC card can provide much more battery life time in order to preserve user data. For more security, the write-protect switch on the SRAM card provides protection from inadvertent data erasure.