Hitachi WT-1 User Guide - Page 24

StarBoard WT-1 Appendix 4.3 Battery Replacement The built-in lithium-ion (Li-ion) battery has a useful life of approximately two years. Continuing to use the battery after this period poses a risk of battery overheating, rupture, or fire. If you notice something unusual when charging or using the battery (such as unusual odors, overheating, discoloration, or deformation), discontinue use and request service. Li-ion batteries are generally not affected by the so-called battery memory effect from repeated use and recharging, and it is claimed that they last longer than other rechargeable batteries. For this reason, no clear values for the useful life (in terms of cycles of use and recharging) are defined. However, battery capacity does decline after repeated use and recharging. The point at which batteries can only be charged to about 80% of the original capacity is defined as their cycle life. The cycle life of the tablet battery is approximately 400 charges. Although you can continue to use the battery after this point, if the battery only lasts for about 8 hours after a full charge, the battery has reached the end of its useful life. Request replacement at this time. CAUTION Do not perform unauthorized disassembly of the WT-1. It may pose a risk of injury from fire or electric shock, and may damage the WT-1. Contact a customer service center regarding battery replacement. 4.4 Replaceable Parts (1) AAA alkaline battery (2) Spare pen tip For details on obtaining them, contact your dealer or a support centre. 4-4 English