Battery Chargers » U2401B http://ebatterychargers.com Tue, 27 Jul 2010 11:48:32 +0000 en hourly 1 http://wordpress.org/?v=3.1 Button Cell Batteries Charger http://ebatterychargers.com/button-cell-batteries-charger-181.html http://ebatterychargers.com/button-cell-batteries-charger-181.html#comments Sat, 12 Sep 2009 13:12:42 +0000 eBatteryChargers.com http://ebatterychargers.com/?p=181 button cell batteryButton batteries or coin cell batteries charger circuit is simple to build, must be powered up from a 9V power supply circuit and can charge up to 5 button cell batteries.

D1 is a protection diode while R1 and C1 decouple the power live of the IC1 U2401B. D3 is for protecting the batteries in case we mount them wrong. R4 limits the current at 5 mA. After we connect the adapter to the main line, the button batteries will start to charge at maximum current for a period of time, after this it will start to charge in impulses. The impulse charging it is always made at 1/10 of the maximum charging current.

R5 = 0,1 * R4
button battery charging time table
button battery charging time table
charger-table

Button battery charger circuit diagram

button batteries charger circuit diagram

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