| http://www.w3.org/ns/prov#value | - In one embodiment, a lithium ion battery is automatically charged to exactly 4.2 VDC. [0035] With reference to the recharging circuit set forth in FIG. 130, a small correction can be added to either the solar cell input voltage reference point (Input Q), or to the output voltage (Input R) to optimize the charging, thereby compensating for temperature, aging, or other effects.
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