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20 PACK LITHIUM 3.7V 4.4ah 16.28WH W/ BMS

Battery Hookup

Regular price $32.00

YOU GET 20 BATTERY PACKS FOR THIS PRICE! JUST $1.60 PER 4400MAH BATTERY!

WHO NEEDS CELL LEVEL FUSING WHEN EVERY CELL HAS A BMS AND A TEMPERATURE SENSOR?

THESE ARE GREAT LITTLE PACKS, PERFECT FOR DIY PROJECTS. THEY CAME OUT OF GETAC SCANNING DEVICES. WE TESTED OVER 100 OF THESE AND THEY TESTED AROUND 95% ON AVERAGE. THIS IS A PERFECT EXAMPLE OF HOW TECHNOLOGY MOVES FASTER THAN THE BATTERIES DEGRADE. THESE CAME OUT OF SCANNERS THAT WERE "UPGRADED" AND ONLY IN SERVICE FOR 18 MONTHS. SO THESE BATTERIES PROBABLY ONLY SAW LESS THAN 20 CYCLES.

EACH PACK IS BASICALLY 2x 2200mah CELLS IN PARALLEL, EACH WITH THEIR OWN 2A BMS. WE TESTED THESE PACKS AT 4A CONTINUOUS FOR A FULL DISCHARGE SO YOU CAN CERTAINLY DISCHARGE AT A 1C RATE.

THE TWO RED WIRES ARE CONNECTED TO THE SAME POSITIVE BMS TERMINAL AND THE TWO BLACK WIRES ARE ALSO CONNECTED TO THE SAME NEGATIVE TERMINAL ON THE BMS AS SHOWN IN THE PHOTOS. THE WHITE WIRE DOES NOTHING FOR US. EASILY BUILD A BATTERY PACK BY SOLDERING OR USING SPLICE CONNECTORS. CHARGE UP EACH BATTERY, CONNECT THEM IN SERIES OR EVEN PARALLEL THEM BY SOLDERING THEM TO A COPPER FLAT BAR. THIS WILL MAKE A VERY LONG LASTING, ENERGY DENSE BATTERY PACK WITH SUPER SAFETY FEATURES BUILT IN. NO WASTED DIAMOND SPACE LIKE YOU GET WITH CYLINDRICAL CELLS.

EACH BATTERY WEIGHS 3.1 OUNCES. MEASURES 3" x 2.25" x 3/8" AND YOU GET AROUND 2 INCHES OF WIRE LENGTH TO WORK WITH. THE CONNECTOR IS A 5 PIN CONNECTOR WHERE THE PINS ARE 1.25MM SPACED. IT APPEARS TO BE A JST CONNECTOR BUT I'M NOT CERTAIN. MY RECOMMENDATION IS TO CUT ONE WIRE AT A TIME NEAR THE CONNECTOR. TRIM THE WHITE WIRE ALL THE WAY DOWN SINCE YOU DON'T NEED IT. EXPOSE AROUND A HALF INCH OF THE WIRE ON THE TWO BLACK AND TWO RED WIRES. TWIST THE TWO BLACK WIRES TOGETHER THEN TWIST THE 2 RED WIRES TOGETHER. THAT IS YOUR MAIN POSITIVE AND NEGATIVE. USE SOME B-WIRE CONNECTORS TO MAKE SERIES CONNECTIONS OR TO PARALLEL WIRE THEM GRAB SOME COPPER PIPE, HAMMER IT FLAT, SOLDER YOUR CONNECTIONS TO THAT.

GETAC CUSTOMERS ACTUALLY USED TO PAY $39.99EACH FOR THESE REPLACEMENT BATTERIES WHICH IS CRAZY.