Independent slots charger batteries charged independently,can be mixed charged, fully charged for each batteries and convienince Tinyfish universal charger can fully charge each battery, as the feature of independent charge, no need to charge 2pcs or 4pcs togheter, or same size of batteries charged together. different size, different capacity batteries can charge at a time. bring clinets very convienince in charging. But do not mix different chemical batteries charge at a time. non-rechargeable alkaline do not mix charge with rechargeable NiMh(Nickle metal hydride) or NiCd(Nickle Cadimium) Batteries. Alkaline battery 1.5V, specical "alk" Grade is for alkaline battery, charging Voltage higher than NiMh(1.2V) and NiCD(1.2V). the charging current is small under 100mA, To charge NiMh and NiCd, the charging Current goes to 850mA. charge fast for NiMh or NiCd rechargeable battery. Alkaline can not bear the fast charging current which for rechargeable batteries. double monitor dual color led lights and wide screeen monitor the charging discharging status and bad battery or reversed inserted battery detected double monitor dual color LED lights and wide screen monitor status. Dual color lights. red-batteries fully charged/battery discharging green-batteries in charging blink-bad battery/reverse inserted battery Wide screen battery bar goes up- batteries in charging Battery bar goes dow-batteries in discharging bad- battery detected bad Blink-battery deteced bad or insterted reversed. Each battery match the battery charging discharging respectly LED and Screeen double monitor charger working status and batteries charging discharging reverse insterted or bad batteries tested dishcarging status Screen show DIS, Cell bars climbing down, Led turn orange charging status Screen show CHA, Cells Bars climbing up LED turn green fully charged Screen show OK, Cells bar full and stop. LED indictors turn red reverse insterted or bad batteries tested Screen show BAD as batteries bad or reversed inserted. LED blinking. Please insert Batteries of positive and negative poles. And Switch the postion of NiCd/NiMh/ALk properly accoding to the batteries Chemical type. Charger detect batteries bad or reveresed,then process NiCd Position Switch to the Very Left Switch to The left, NiCd Position,after detect no bad or reversed batteries insterted, It will go 3 process automatically. I. Discharging, screen show DIS (orange LED) to 1.0V around-batteries bars climbing down, automatically turn to charging. II. Charging screen show CHR batteries bar climbling up, green LED III. Fully charged, screen show OK, batteries bar stop climbling (Red LED) NiMh Position Switch to the Middle Switch to The left, NiMh Position,after detect no bad or reversed batteries insterted, It will go 2 process automatically I. Charging screen show CHR batteries bar climbling up, green LED II. Fully charged, screen show OK, batteries bar stop climbling (Red LED) Alk Position Switch to the very right Switch to The right, Alk (alklaine) Position,after detect no bad or reversed batteries insterted, It will go 2 process automatically I. Charging screen show CHR batteries bar climbling up, green LED II. Fully charged, screen show OK, batteries bar stop climbling (Red LED) Crystal transparent cover artistic creation, crystal transparent cover and wide screen Lcd monitor monitoring the status of batteries charging and discharging. Universal charger function of Discharge to refresh batteries To refresh batteries and jump up the power, enlong batteries life and perform fully power To refresh batteries life and enlong batteries fully power performed. to refresh the batteries, special for NiCd memory feature, discharge it and charge it. to fully perform the batteries power.