R20 Size D Dry Cell Battery

Quick Details

Place of Origin: Guangdong, China (Mainland)
Brand Name: Perfecell
Model Number: R20 Size D UM1
Battery Type: Zn/MnO2
Nominal Voltage: 1.5V
Size: D
Nominal Capacity: >350MIN, 3.9 Ohm continuous discharge, E.P.V.0.9V
Chemical system: Zinc-manganese dioxide (Zn/MnO2)
Technology Criterion: IEC60085-2:2007,2006/66/EC
Certificate: SGS, ISO9001:2008,MSDS,SONCAP etc
Short Circuit Current: >5A
Continuous discharge: >350 MIN
Jacket: PVC
Quality: Excellent
Diameter: 32.30-34.20 MM
Height: 59.50-61.50 MM
Mercury: <0.025%

Quality control & performance:

1)Our battery is made of high quality raw materials which have been inspected strictly before usage.



2)Our workers and technicians closely watched each step in the battery production processes, strictly executed the quality management system to insure each battery up to IEC standard.



3)Our battery has the characteristics of high capacity, long-durability, super leak-proof, good performance of continuous discharge, long time of intermittent discharge, and it has low decline rate of capacity.

Chemical reaction:

In a zinc¡§Cmanganese dioxide dry battery, the zinc can is the negative terminal through which the electric current flows into the device. The zinc is oxidised according to the following half-equation.



Zn(s) ¡¨² Zn2+(aq) + 2 e− [E¡ã = -0.7626 volts]
The positive terminal is a mixture of chemicals ¡§C usually a mixture of manganese dioxide powder, carbon and an electrolyte to increase the electrical conductivity. A carbon electrode rod also is placed inside the middle of the battery, connecting the two metal-capped ends of opposite charge and serving as the positive terminal.The reaction is as follows:
2MnO2(s) + 2 e− + 2NH4Cl(aq) ¡¨² Mn2O3(s) + 2NH3(aq) + H2O(aq) + 2 Cl− [e¡ã ¡Ö +.5 v]
and the Cl− combines with the Zn2+.
There are other possible side-reactions, but the overall reaction in a zinc¡§Cmanganese dioxide battery can be represented as:
Zn(s) + 2MnO2(s) + 2NH4Cl(aq) ¡¨² Mn2O3(s) + Zn(NH3)2Cl2 (aq) + H2O(l)

We promise to provide you with high quality battery as well as high efficiency services.

2 PCS Shrinked, 24 PCS/Colorful Box, 288 PCS/Colorful Carton, 1,050 Cartons/20' FCL