When using the XTAR cells I did in fact see a low-battery warning triggered on the A590, something I never saw with the TENAVOLTS cells. That feature may be an explanation of the different results on the Opus charger. When specifically asked, XTAR indicated that the output of their cells would drop to “around 1.1 V” when the XTAR’s low-voltage feature is engaged. This is purported to be a function that is intended to trigger a low-battery warning on the device being powered by them, if so equipped. Printed on each XTAR cell is the statement “Built-in protection of Over-charge/Over-discharge/short- circuit”, and “Unique low-voltage indicator”, which is a unique feature claimed by XTAR for their rechargeable 1.5V cells. ![]() The Tenavolt cells all returned ‘NULL’ results every time in four attempts on the OPUS 3100. The XTAR cells returned mAh capacities ranging from 1,581 to 1,621, about what I expected. Seeing as how I don’t have any kind of advanced testing equipment for cell testing and, wishing to make as scientific a review as possible, I began by testing mAh capacity in my Opus 3100 V2.2, with draw set to 0.30A. The A590 eats alkies like candy, again leaving lots of capacity left over for use in any device not as demanding.Ĭounting camera-shots-per-cell-pair is fairly subjective, due to variables such as screen-on time, flash usage (or not), and temperature. Lithium primary AA’s are far better in both respects, but even they have much lifetime remaining for other, less demanding devices when the camera demands fresh cells. Cold weather shortens available lifetime of NiMh cells even more, if they work at all. Even using freshly charged Eneloop, Eneloop Pro or Fujitsu AA NiMh cells, the number of shots available from them is very limited before the camera whines about cell voltage and abruptly shuts down. ![]() This is a camera that’s very picky when it comes to AA cells. The test mule is my trusty old Canon PowerShot A590 camera. TENAVOLTS may well have modified their offerings since then, which might change the comparison outcome. old, with maybe three charge / discharge cycles on them prior to this review. Please keep in mind while reading this review that the TENAVOLTS cells are two yrs. I have no association with TENAVOLTS in any way, nor have I been compensated by TENAVOLTS. old this month, purchased by me from Amazon on some flash discount or other short-term savings. The XTAR cells in this review have incorporated into them a function claimed to give a low-battery warning on devices so equipped prior to shutdown.Īs part of the review I’ll also be comparing the XTAR AA kit with a similar AA kit under the brand name TENAVOLTS four TENAVOLTS 1.5V AA rechargeable cells and matching, dedicated charger. ![]() The 1.5v rechargeables typically maintain full 1.5 volts until abruptly shutting down. This can be a necessary advantage for devices that whine about low voltage on 1.2v NiMh cells. I have no other association with XTAR in any way.ġ.5v AA rechargeable cells don’t exhibit the lower voltage (~1.2v nominal) common to NiMh cells. XTAR donated the kit to me at no cost in return for an honest review on BLF. ![]() This will be a review of the kit introduced late last year consisting of four XTAR 1.5V AA rechargeable cells and matching, dedicated charger.
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