GsYuasa Enitime AAA Ni-Mh LSD batteries
Reviewer's Overall Rating: ★★★★☆
Summary:
| Battery chemistry: |
Ni-Mh |
| Size/Category: | AAA |
| Special things: |
LSD (80% after a year) |
| Capacity: |
800mAh |
| Price Payed: | 8.13 $ |
| From: | DealExtreme |
| Date Ordered: | July 2011 |
Pros:
- True capacity as claimed (800mAh)
- Very good build quality
- Seems to be real LSD technology
Cons:
- From the 2 packs received (with 2 months of difference), I measured the batteries in one pack and they were at 1,2 - 1,3 volts... while in the other pack the batteries were at 1,1 - 1,2 very low volts.
- There is a cheaper option (not tested by me) with 50mAh more capacity (http://www.dealextreme.com/p/btone-rechargeable-1-2v-850mah-aaa-batteries-4-piece-pack-91884?r=43033281)
Features / Value: ★★★★☆
Some months ago I ordered those batteries, and a few days latter I ordered another pack. So I have 2 packs.
At least in paper, reading what it claims in the package, they look tempting. 800mAh AAA LSD batteries in a pack of 4 for 8,13$... and it reads in the package they hold up to the 80% of the charge after a year.
OK let´s take my Imax and test their capacity.
Then, I will try to do a long-run test, long-time capacity measurement to see how much they can hold.
Design / Build Quality: ★★★★★
Not much to say. Watch the package and the batteries itself and take a conclusion. They look good.
They doesnt have any "venting" hole, or they are "hidden".
Capacity test: ★★★★★
I have used my Imax B6 to test them. Take into account that, I still dont know to use it completely, and I have issues with the "delta peak" charging Ni-Mh batteries, so...
The procedure of charging and discharging has been made in this way:
Discharge: 0,3A down to 0,9v
Charge: 0,3A up to fully charged (some problems with the "delta peak" and the Imax, but not due to to batteries itself, I still trying to solve that issue... maybe the nedymiun magnets and the springs I use with the imax...)
The first pack has this measurements of voltage:
When received (charged from factory): . 1.278 1.278 1.280 1.281
After the first charge:................. 1.405 1.401 1.410 1.450
After a day (first cycle):................. 1.378 1.379 1.380 1.369
After 5 complete charge and discharge cycles, the capacity results measured with the Imax are (charge mode):
767 802 771 799
If you dont beleive or dont trust my tests, you check the photos in DX page, one user posted a photo showing the capacity measured with an inteligent charger with LCD display, you can see measures of 947, 834, 908, 1191 mAh.
The second pack, is completing their 5 complete full cycles of charging and discharging. I will update the post with the results. But as I said, they arrived in a very dissapointing charge condition, the first discharge result gave me pityfull results similar to 130, 110, 50, 70 mAh or something like that... I dont remember...
I think those batteries were manufactured more than 1 or 2 years ago, and stored in a wharehouse for a very long time, that´s why those low voltages when receiving them....
Low Self Discharge test: ★★★★☆
I will try to test them after a year resting with no use. I will try to keep at least 2 of them without being used. Completely charged and not used in a year, then check their voltage and their capacity after a discharge test in the Imax.
In a short-time period, lets say a week, they seem to keep the charge very well.
After a week (pack 1): 1,37n 1,38n 1,39n 1,36n
After 1 month (pack 2): 1.328 1.325 1.323 1.326
It seems that they hold the charge pretty good, at least, after a month... take into account that the most high self-discharge will occurr during the first month...
I have to do a discharge test to see the remaining capacity after a month...
Summary: ★★★★☆
I dont give 5 full stars because there is a cheaper option with 50mAh more capacity (but, again, not tested by any person yet).
If those new B-Tone batts are not what they promise, these GsYuasa will receive the 5 full stars.
Maybe some people will prefer real Eneloops for a bit more of money...
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