Which rechargeable battery is better in shelf life in 2-3 ye

If a battery is on a shelf and you do nothing with it, its voltage will drop gradually, which is called shelf life of that particular battery.

I have recorded daily voltage drop of different rechargeable batteries for more than 10 years. I only put the first two to three year's data on the graph, since the software i'm using will not handle that amount of data.

The batteries which voltages were recorded daily are:

1. Rayovac rechargeable, AAA, NiMH. 1.2 V

2. Energizer AAA, NiMH, 1.2 V, 850 mAh

3. Power Genix rechargeable, NiZn, 1.6 V, 2500 mAh (average of 4 cells)

4. Duracell rechargeable, AA, NiMH, 1.2 V, 2850 mAh (average of 4 cells)

5. Raynovac Hyvrid AA, NiMH, 1.2 V, 2100 mAh (average of 4 cells)

6. 浩霸 haoba, rechageable, NiMH, 9 V, 280 mAh (voltages are devided by 7)

7. Raynovac rechageable, NiMH, 9 V (voltages are devided by 7)

8. Eneloop rechageable, AA, NiMH, 1.2 V, 1900 mAh

9. Digital rechageable, NiMH, 1.25 V, 1800 mAh (average of 4 cells)

10. Rayovac rechargeable, AA, NiMH. 1.2 V, 2000 mAh

11. rechargeabe 9 V,  lithium-ion battery. Missing in the picture, it was not mine, I don't own this battery

12. Tenengy rechargeable NiMH, 4/5A, 2000 mAh

Partial raw data recorded on the sheets:

A shelf life chart (rechargeable battery's daily voltage drop):

 

9 V, lithium-ion battery (for battery number 11):

Conclusion:

Best: Eneloop AA (Battery No. 8), Rayovac hybrid AA (battery No. 5), Rayovac  AAA (battery No. 1), lithium-ion battery (9V) (battery No. 11)

Better：浩霸 haoba 9 V (battery No. 6)

Worst: 

Battery No. 2. Energizer AAA, NiMH, 1.2 V, 850 mAh

Battery No. 3. Power Genix rechargeable, NiZn, 1.6 V, 2500 mAh (average of 4 cells)

Battery No. 4. Duracell rechargeable, AA, NiMH, 1.2 V, 2850 mAh (average of 4 cells)

Battery No. 7. Raynovac rechageable, NiMH, 9 V (voltages are devided by 7)

Battery No. 9. Digital rechageable, NiMH, 1.25 V, 1800 mAh (average of 4 cells)

Battery No. 10. Rayovac rechargeable, AA, NiMH. 1.2 V, 2000 mAh

Battery No. 12. Tenengy rechargeable, 4/5A, NiMH,  2000 mAh

 

所有跟帖： 

• 沙發！占位點讚。等有空細看。 -盈盈一笑間- ♀ (0 bytes) () 11/21/2023 postreply 07:40:16

• WOW! 堅持三年的測試。這是生活中的科研達人。興趣帶來樂趣。：） -盈盈一笑間- ♀ (0 bytes) () 11/21/2023 postreply 07:59:03

• 大讚嚴謹！NiMH電池普遍電壓下降嚴重，恐怕跟材料有關。從買電池人的角度，還有成本問題，比如Eneloop是比較貴的。 -唐宋韻- ♂ (0 bytes) () 11/21/2023 postreply 09:02:30

• Neither the Energizer nor Duracell lasted as advertised! Ref -TJKCB- ♀ (331 bytes) () 11/21/2023 postreply 10:09:48

• Do you have references for your own data? Best: Eneloop AA -TJKCB- ♀ (395 bytes) () 11/21/2023 postreply 10:11:25

• I checked Bard -xia23- ♂ (769 bytes) () 11/21/2023 postreply 15:09:07

• in youtube, you type eneloop, energizer and duracell -xia23- ♂ (3263 bytes) () 11/21/2023 postreply 15:32:14

• battery specialist! -衛寧- ♂ (0 bytes) () 11/21/2023 postreply 12:33:42