App note: Low-current charger provides battery backup from USB to 1-cell applications

Dangerous Prototypes
App note: Low-current charger provides battery backup from USB to 1-cell applications

an_maxim_AN5799

Another app note from Maxim Integrated on small current battery management. Link here (PDF)

The circuit provides a 1-cell Li ion backup battery charger for low-current devices performing resistor limited current sharing

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App note: Low-current charger provides battery backup from USB to 1-cell applications