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Ryobi TEK4 Multimeter Battery Charging - Very Nerdy
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Time to charge the AP4001 battery in my Ryobi RP4020 TEK4 Digital Multimeter. Shall I use the AP4800 charger (10 hours with no temperature monitoring), or the AP4700 charger (3 to 4 hours) or the AP4500 dual battery charger on either 12 Volts (2.1mm connector) or 5 Volts USB?
