TOTEX U80221-4 Lithium-Ion Rechargeable Battery 989803199221 453564674191 for PHiliphh TC20 TC30 TC50 ECG Machine

►Quick Detail:

TOTEX U80221-4 is suitable for PHiliphhh PageWriter TC20 TC30 TC50 ECG battery 11.1V 7.8Ah lithium-ion battery 989803199221 P/N 453564674191

Model: U80221-4
Weight: 490g

Part number: 989803192211, 453564674191

Application: PHiliphhh PageWriter TC20 TC30 TC50 ECG

Electricity meter: 4-segment LED with button

Voltage: 7.8V

Capacity: 11.1V/81.6Wh

Chemical composition: Lithium ion

Rechargeable: Yes

Status: Brand new

►NOTES :

Because low temperature fast charging can damage the battery, do not use fast charging when charging lithium-ion batteries in winter.

When charging, lithium ions swim from the positive electrode to the negative electrode. Lithium ion batteries are also known as rocking chair batteries, which means that lithium ions continuously ionize between the positive and negative electrodes. During charging, lithium ions migrate through the separator from the positive electrode to the negative electrode. When fast charging is needed, a large amount of lithium ions need to be returned to the negative graphite in a short period of time. The surface area of graphite is limited, and it is impossible to receive so many lithium ions at once. At this time, it will inevitably cause lithium ion crowding. If there is too much crowding, some lithium ions will be lost and cannot return to the negative electrode. This loss rate is closely related to temperature and charging speed.

The lost lithium ions will no longer participate in the charging and discharging of the battery in the future. They are still near the negative electrode of the battery, but they have changed from lithium ions to lithium metal, becoming silver white metallic lithium attached to the surface of the negative electrode. This phenomenon is called "lithium deposition" in the industry.

If charging continues at low temperatures or with high current, lithium metal will begin to crystallize, forming fork like crystals. Over time, these branches grew larger and eventually punctured the battery separator, causing the battery to short-circuit and catch fire.

►Key features:

► Company situation:

The company has been professionally operating various brands of original medical monitoring instruments since 2015. The company has many professional senior engineers and has sufficient ability to undertake various medical equipment maintenance work. Covering motherboards, sensors, probes, modules, connectors, shells, etc. for various medical monitoring equipment.

►About delivery:

We default to express delivery by DHL,Fedex, We will contact you as soon as possible when sending express delivery. If you have any questions after receiving the express delivery, please feel free to contact us at any time.