Li-Ion Battery With Lithium Battery Charger Super 3000mah Lithium Batteries Pack
|Product Type||Lithium ion batteries|
|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|
|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.