9/15/2023 0 Comments Ni zn rechargeable aa batteriesMany positions on the PCB are not populated – it seems that these are options which are used for different chemistries or DC power input charging. It seems there is a little attention paid to isolation as you can see from the milled groove in the PCB separating the high voltage from the low voltage. Internally, the charger is constructed on a single piece of PCB, single sided. The model number is HG-1206W, and it seems like there are multiple versions of this charger suitable for different chemistries. Unfortunately, I had opened it up before, so some of the data is missing on the rear label. It is quite cheaply constructed, and features a single bi-colour LED for charge level indication. The charger supplied was a bundled charger. Keeping in mind that we’re not comparing with the largest capacity Ni-MH cells, the Ni-Zn batteries seem to be competitive on energy content – in both cases being rated superior. Taking the voltage and energy given, we can do the conversions to compare them with the “regular” eneloop cells of today: mAh mWh The reason is due to the higher cell nominal voltage, and mWh represents the cell’s energy content, rather than the cell’s current capacity (which needs to be multiplied by the nominal voltage to get the energy content). The battery manufacturers plaster the cell capacity ratings in mWh as they claim that it’s unfair to label it in mAh. It’s interesting to see them actually bothering to manufacture these types of cells given many have not heard of it. Regardless, apparently there was a lot of excess stock, or someone else decided to manufacture under the same name, which is how I ended up with these.įor the AAA’s, I went with the “unbranded” option, which was almost certainly a Chinese generic manufacturer. They continue to target their technology at hybrid vehicles, but I haven’t heard any interest at all. These were the Powergenix 1.6v 2500mWh cells, Made in China.ĭespite Powergenix introducing it to the market in 2009, they exited the Ni-Zn consumer battery market merely a couple of years afterward. For the AA’s, I opted for the better looking “branded” cells. As it turns out, no local retailers stock Ni-Zn, but there was a plentiful supply on eBay. The Batteriesįor my Ni-Zn adventure, I had to turn to eBay. As it turns out, I decided to give them a go almost a year ago, and here are my findings. The Ni-Zn, by being much more similar to the Ni-Cd in nature, was supposed to provide the benefits of both worlds. Despite winning several technological accolades at the time, they fell out of favour quickly. None of these batteries even bothered advertising their capacity. Several of mine had leaked after about 15 or so cycles, by which point they were useless. Over time, they also grew higher in internal resistance making them unusuable in heavy draw devices, such as early digital cameras. It is the same marketing strategy as used by Rechargeable Alkaline Manganese (RAM, Grandcell) batteries which boasted an “exact” 1.5v, although those suffered from v ery short cycle life (and I was convinced that some of them were merely repackaged disposable alkalines). The main claim of the Ni-Zn battery was a higher output voltage, often stated on batteries as 1.6v or 1.65v, which better matched the 1.5v of alkaline cells and would prolong runtime in voltage-sensitive electronics. Varta Ready2Use).īut aside from Ni-MH and Ni-Cd, there was another battery chemistry which was struggling for some attention – the Ni-Zn battery. Having suffered through Energizer 2500mAh cells which were useless after about seven days rest, the Eneloop really turned the tables on the Ni-MH technology and the majority of the Ni-MH cells on the shelves tend to be low-self discharge versions in various names (e.g. The price is also reasonable, and their low self discharge rates are amazing. In fact, when it comes to AA/AAA’s, my favourite has been the Sanyo Eneloops because of their extremely reliable and consistent performance (soon to be called Panasonic Eneloop following the acquisition of Sanyo’s battery division by Panasonic). These cells provide a nominal 1.2v, but have improved over time to offer larger capacities and lower self discharge. It took over as the superior technology both environmentally and technically compared to Ni-Cd. The Ni-MH rechargeable battery is the most common AA/AAA rechargeable battery chemistry.
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