Posts Tagged ‘NiMH battery

1-2v-aa-3000-mah-bty-nimh-batteries

The 1.2V AA 3000 mAh BTY NiMH batteries are something that you may find in a lot of Chinese online stores as well as on eBay and what you will notice for sure with these batteries is that they are being sold very cheap for 3000 mAh capacity. These rechargeable AA batteries supposedly offer the very high capacity of 3000 mAh and the considering their very cheap price should raise an alarm, meaning that the capacity rating is most likely lower than advertised. It is always a wise idea to avoid getting such batteries, but we got a pack of four in order to be able to test them and see what is the actual capacity that these batteries are providing and how much it differs from the advertised 3000 mAh. We were prepared for nothing more than half the advertised capacity, but going through a Break-In mode on the MAHA C9000 Charger/Analyzer we were not prepared for such a disappointment. On the photo above you can see the minimum and maximum measured capacity of the pack of four batteries and you will get why we were so disappointed. In fact what we got as available capacity was as follows: 306 mAh, 334 mAh, 337 mAh and 373 mAh and that is from batteries that are being advertised as being able to provide 3000 mAh capacity, not worth buying these regardless of the price, hell they are not worth even if somebody gives them to you for free.

Avoid buying 1.2V AA 3000 mAh BTY NiMH batteries, they are really not worth it!!!

1-2v-aaa-1000-mah-bty-nimh-battery

The 1.2V AAA 1000 mAh BTY NiMH batteries are something that you may find in a lot of Chinese online stores as well as on eBay and what you will notice for sure with these batteries is that they are being sold very cheap for 1000 mAh capacity. The fact that these rechargeable AAA batteries supposedly offer very high capacity of 1000 mAh (among the highest for AAA size NiMHs) and their very cheap price should raise an alarm that the capacity rating is most likely lower than advertised. Normally in such cases it is a wise idea to avoid getting such batteries, but we got a pack of four in order to be able to test them and see what is the actual capacity that these batteries are providing and how much it differs from the advertised 1000 mAh. We were prepared for nothing more than half the advertised capacity, but going through a Break-In mode on the MAHA C9000 Charger/Analyzer we were not prepared for such a disappointment. On the photo above you can see the minimum and maximum measured capacity of the pack of four batteries and you will get why we were so disappointed. In fact what we got as available capacity was as follows: 134 mAh, 140 mAh, 144 mAh and 161 mAh and that is from batteries that are being advertised as being able to provide 1000 mAh capacity, not worth buying these regardless of the price, hell they are not worth even if somebody gives them to you for free.

Avoid buying 1.2V AAA 1000 mAh BTY NiMH batteries, they are really not worth it!!!

1-2v-aa-2550-mah-sanyo-eneloop-xx-nimh-battery

The 1.2V AA 2550 mAh Sanyo Eneloop XX NiMH batteries are of the third generation of Eneloop batteries from Sanyo and are the model designed for powering high current consuming devices such as photo strobe flash lights, wireless keyboards, mice, game controllers, radio controlled toys and a range of household devices. Eneloop XX is the preferred battery by many photographers for powering their photo flashes and other photographic equipment and even on the batteries you can see written “High capacity eneloop for professional use”. The Eneloop XX series is also from the Low Self Discharge type NiMH batteries and can retain up to 85% percent of its capacity after an year of storage, but these batteries are designed to offer up to 500 recharge cycles mostly due to the fact that they are designed to handle higher loads managing well even uner 5A load. These Sanyo Eneloop XX batteries come with a typical capacity of 2550 mAh, but their minimum guaranteed one is 2450 mAh and on their packaging you can only see the minimum and not the typical capacity written, though they are sold as 2550 mAh. They come pre-charged with 50% of their capacity and our measurement for the initial discharge provided between 1254 and 1257 mAh which is well within the 85% for about a year for batteries made in 12-2012, and now let us see how they will perform fully charged.


1-2v-aa-2550-mah-sanyo-eneloop-xx-nimh-battery-capacity

Starting the tests of the 1.2V AA 2550 mAh Sanyo Eneloop XX NiMH batteries with a low constant current discharge rate of 0.2A got us 2452 mAh as useable capacity or right within the minimum guaranteed capacity, though a bit short from the typical – probably at lower load we can get close to it. But these Sanyo Eneloop XX batteries really shine when you get the load higher, by going to 0.5A and 1.0A we barely see a drop in the capacity we get and even at 2.0A constant current discharge rate we get just about 10% less capacity as compared to the 10 times lower load at 0.2A. According to Sanyo’s datasheet these Eneloop XX batteries are supposed to handle well constant current loads of up to 5.0A without that big of a drop in useable capacity and we do plan on testing that at a later time, but for now we can say that Sanyo has done a really good job with the Eneloop XX batteries.

The performance of the 1.2V AA 2550 mAh Sanyo Eneloop XX NiMH batteries in our tests:

– 2452 mAh at 0.2A load
– 2423 mAh at 0.5A load
– 2385 mAh at 1.0A load
– 2200 mAh at 2.0A load

– 3.096 Wh at 0.2A load
– 2.999 Wh at 0.5A load
– 2.856 Wh at 1.0A load
– 2.436 Wh at 2.0A load

Download the official 1.2V AA 2550 mAh Sanyo Eneloop NiMH battery datasheet…


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