Li-Ion Battery With Lithium Battery Charger Super 3000mah Lithium Batteries Pack

Product Type	Lithium ion batteries
Nominal voltage	11.1V
Capacity	Custom
Input	12.6V
Dimension	Custom
Output	12.6-10.8V
Max continuous charge/discharge current	2.5A(Adjustable)
Battery cells	A grade batetry cells
PCM	12V A grade PCM,over-charge/discharge protection, over-heat protection
LED Indicator	Available
ON/OFF Switch	Available
Connectors	5.5*2.1mm DC jack+5.5*2.1mm DC plug
Recharge cycle	More than 500 times
Battery Charger	12.6V US/EU/UK plug
Charging full time	Around 5 hours
Operating temperature	-20 °C to 60 °C
Charge temperature	-0 °C to 45 °C
Storage temperature	-20 °C to 45 °C
Operating humidity	5% to 90%,non-condensing

The researchers first decided the anode needed to be sulfur, a widely available byproduct of natural gas and petroleum refining that’s very energy dense, having the lowest cost per stored charge next to water and air. The challenge then was finding an inexpensive liquid cathode material that remained stable while producing a meaningful charge. That seemed improbable — until a serendipitous discovery in the lab.

On a short list of candidates was a compound called potassium permanganate. If used as a cathode material, that compound is “reduced” — a reaction that draws ions from the anode to the cathode, discharging electricity. However, the reduction of the permanganate is normally impossible to reverse, meaning the battery wouldn’t be rechargeable.

Still, Li tried. As expected, the reversal failed. However, the battery was, in fact, recharging, due to an unexpected oxygen reaction in the cathode, which was running entirely on air. “I said, ‘Wait, you figured out a rechargeable chemistry using sulfur that does not require a cathode compound?’ That was the ah-ha moment,” Chiang says.