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Eneloop Pro vs fakes - self-discharge test after one year
Promotion (continue reading below)
You can buy original eneloop rechargeable batteries in the hurt.com.pl store - the latest ones are available from April 2022 in new, environmentally friendly, plastic-free packaging.
New - improved MCDE series Higher capacity min. 2000 mAh - up to 2100 charging cycles New improved HCDE series New eco-friendly packaging for storing rechargeable batteries - the highest capacity among the new generation of 2500 mAh rechargeable batteries
4 x Panasonic Eneloop Ni-MH 2000mAh BK-3MCDE/4BE rechargeable batteries (blister)
New eco-friendly packaging for storing rechargeable batteries
- retains 70% of energy after 10 years after charging!
- works at low temperatures down to -20°C. C!
- charged in the production process with solar energy
Made in Japan
4 x Panasonic Eneloop PRO NEW Ni-MH 2500mAh batteries R6 / AA BK-3HCDE/4BE (blister)
- retains 85% of energy after 12 months after charging!
- works at low temperatures down to -20°C. C!
- charged in the production process with solar energy
Made in Japan
Each of us happens to put previously charged Ni-MH batteries in a drawer with the idea that they will be used in the near future or simply to have a supply for the flash during the next photo session.
For most rechargeable batteries, the storage period of several weeks or even several months is not a major problem, but in the case of the black Eneloop Pro, we can count on up to 85% charge, according to the manufacturer's promises, and this is after a year from removing it from the charger. This means that these are actually rechargeable batteries always ready to use – this is also a distinguishing feature of this brand's rechargeable batteries from the competition, where this indicator is usually noticeably worse. Eneloop Pro are one of the most stable and predictable high-capacity batteries.
Ni-MH batteries are of course recommended to be recharged more often than once a year – especially batteries with such a high capacity degrade quite quickly due to the passing time – they age even when unused. However, the ability to hold energy over time is the domain of Eneloop Pro rechargeable batteries.
How did counterfeit branded rechargeable batteries fare on this front?
We have checked it thoroughly. After 13 months from charging, the set of batteries was placed in a specialized measuring device. The discharge current was 500 mA, and the discharge ended when the voltage on any of the batteries dropped below 1.0V.
Rechargeable batteries in the set of 4 pcs. They have been connected in series to make the test as practical as possible and reflect typical use.
Eneloop Pro 2500mAh AA rechargeable batteries vs "2500" mAh fakes
The chart leaves no illusions.
Original Eneloop rechargeable batteries from our wholesaler lasted more than twice as long, and with a significantly higher output voltage.
Note that the Eneloop battery pack was discharged at 4,533V, while the average voltage from the entire counterfeit discharge process was only 4,592V. It is possible that in some devices counterfeit rechargeable batteries would not even start...
Partial capacity results at 13 months from charging for each cell:
- Eneloop Pro AA: 1724 mAh, 2104 mAh, 2180 mAh, 2198 mAh
- AA fakes: 1311 mAh, 1284 mAh, 658 mAh, 685 mAh
The manufacturer of rechargeable batteries, Eneloop, assures that we can count on up to 85% of the remaining capacity after 12 months of storage, while we achieved results from 69% to 88% after 13 months, which we consider a very good result.
For 3 out of 4 rechargeable batteries, the result obtained after 13 months of storage is still better than for counterfeits measured immediately after charging.
On the packaging of the counterfeits, of course, we will also find a proud-sounding inscription that they retain up to 85% of their capacity after 12 months of storage. If we hypothetically assume that these are actually 2500 mAh batteries, the results obtained are only 26% - 52% of the remaining capacity after 13 months.
In fact, as we have proven earlier, these are not 2500 mAh batteries, but only about 1900 mAh. We then get results at the level of 35% - 69%.
Rechargeable batteries with slightly lower capacities are often more repeatable and more reliable – but not this time. The spread of the obtained values is very high – higher than any of the 1900-2000 mAh batteries in our offer.
AAA Eneloop Pro 930 mAh rechargeable batteries vs fake "950" mAh
As in the case of the AA model, there is a gap between the fakes and the originals.
Original Eneloop Pro batteries used after 13 months from the moment of charging were also more than twice as good as counterfeit batteries. Again, the Eneloop batteries maintained a significantly higher voltage. The final discharge voltage of the pack consisting of the original Eneloop Pro was 4.399V, while the average operating voltage of the counterfeits was 4.45V.
As with the AA model, some devices could not even start on counterfeit batteries or last very short time, with significantly reduced performance.
Partial capacity results at 13 months from charging for each cell:
- Eneloop Pro AAA: 759 mAh, 762 mAh, 754 mAh, 603 mAh
- Fake AAA: 274 mAh, 283 mAh, 324 mAh, 293 mAh
The originals achieved a residual capacity score of 65% - 82% after 13 months of storage.
Counterfeits (in the optimistic variant, where we assume that their true capacity is 800 mAh) can boast a result of 34% - 41%. The results obtained by counterfeits are very poor – below expectations for new generation batteries with a low self-discharge rate.
Our follow-up test proves that counterfeit Eneloop rechargeable batteries on the market offer incomparably lower quality than genuine rechargeable batteries.
In some applications, we will be in for an unpleasant surprise in the form of several times shorter operating time. The whole is complemented by a much lower operating voltage, poor charge retention over time and, of course, significantly lower rated capacitances.
In order to save your nerves, we encourage you to buy original Ni-MH rechargeable batteries "at the source" – Baltrade sp. z o.o., the owner of the hurt.com.pl service offers only original products – we are an authorized distributor of Eneloop rechargeable batteries in the EU.
You can buy original eneloop rechargeable batteries in the hurt.com.pl store - the latest ones are available from April 2022 in new, environmentally friendly, plastic-free packaging.
4 x Panasonic Eneloop Ni-MH 2000mAh BK-3MCDE/4BE rechargeable batteries (blister)
New - improved MCDE series
Higher capacity min. 2000 mAh
New eco-friendly packaging for storing rechargeable batteries
- up to 2100 charging cycles
- retains 70% of energy after 10 years after charging!
- works at low temperatures down to -20°C. C!
- charged in the production process with solar energy
Made in Japan
4 x Panasonic Eneloop PRO NEW Ni-MH 2500mAh batteries R6 / AA BK-3HCDE/4BE (blister)
New improved HCDE series
New eco-friendly packaging for storing rechargeable batteries
- the highest capacity among the new generation of 2500 mAh rechargeable batteries
- retains 85% of energy after 12 months after charging!
- works at low temperatures down to -20°C. C!
- charged in the production process with solar energy
Made in Japan