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Below is info on caring, storing, and charging different types of batteries

 

Nickel-metal hydride (Ni-MH)

Intro 

Nickel-metal hydride battery, abbreviated NiMH, \

Charging

The charging voltage is in the range of 1.4-1.6 V/cell. A fully charged cell measures 1.35-1.4 V (unloaded), and supplies a nominal average 1.2 V/cell during discharge, down to about 1.0-1.1 V/cell (further discharge may cause permanent damage).

 

The chart below shows the most common battery pack sizes and charge rates

Battery Capacity

1C Fast Charge Rate

0.1 C Slow Charge Rate  16hrs (Over Night)

100mah

100mah

10mah
300mah 300mah 300mah

600mah

600mah

60mah

1100mah

1.1amp

110mah

3000mah

3amp

300mah

 

 

Self-discharge

NiMH historically had a somewhat higher self-discharge rate (equivalent to internal leakage) than NiCd in the past. However, this is no longer the case. The self-discharge is 5-10% on the first day, and stabilizes around 0.5-1% per day at room temperature.[5][6][7][8][9] This is not a problem in the short term, but makes them unsuitable for many light-duty uses, such as clocks, remote controls or safety devices, where the battery would normally be expected to last many months or years. The rate is strongly affected by the temperature at which the batteries are stored with cooler storage temperatures leading to slower discharge rate and longer battery life. The highest capacity cells on the market (> 2700mAh) are reported to have the highest self-discharge rates

 

Nickel-Cadmium (Ni-Cd)

Intro 
 

The nickel-cadmium battery (commonly abbreviated NiCd and pronounced, "nye-cad") is a popular type of rechargeable battery using nickel oxide hydroxide and metallic cadmium as electrodes.

 

The chart below shows the most common battery pack sizes and charge rates

Battery Capacity

3C Fast Charge Rate

0.1 C Slow Charge Rate  16hrs (Over Night)

100mah

300mah

10mah
300mah 900mah 300mah

600mah

1.8amp

60mah

1100mah

3.2amp

110mah

2400mah

7.2amp

300mah