See also: History of the battery Thomas Edison's nickel–iron batteries manufactured under the " Exide" brand, originally developed in 1901 by Thomas Edison used a potassium hydroxide electrolyte.īatteries with alkaline (rather than acid) electrolyte were first developed by Waldemar Jungner in 1899, and, working independently, Thomas Edison in 1901. Īlkaline batteries are used in many household items such as MP3 players, CD players, digital cameras, toys, flashlights, and radios. However, compared to other battery types, the toxicity of alkaline batteries is moderate. Alkaline batteries contain zinc (Zn) and manganese dioxide (MnO 2) (Health codes 1), which is a cumulative neurotoxin and can be toxic in higher concentrations. In Switzerland, alkaline batteries account for 68%, in the UK 60% and in the EU 47% of all battery sales including secondary types. In Japan, alkaline batteries account for 46% of all primary battery sales. Other battery systems also use alkaline electrolytes, but they use different active materials for the electrodes.Īlkaline batteries account for 80% of manufactured batteries in the US and over 10 billion individual units produced worldwide. The alkaline battery gets its name because it has an alkaline electrolyte of potassium hydroxide (KOH) instead of the acidic ammonium chloride (NH 4Cl) or zinc chloride (ZnCl 2) electrolyte of the zinc–carbon batteries. Typically these batteries derive energy from the reaction between zinc metal and manganese dioxide.Ĭompared with zinc–carbon batteries of the Leclanché cell or zinc chloride types, alkaline batteries have a higher energy density and longer shelf life, yet provide the same voltage. That’s impressive.Size comparison of alkaline batteries (left to right): C, AA, AAA, N, PP3 (9-volt).Īn alkaline battery (IEC code: L) is a type of primary battery where the electrolyte (most commonly potassium hydroxide) has a pH value above 7. Testing the batteries for 50 charge cycles, measuring every 10 cycles, I found that this measurement was super-stable, with no drop-off in performance. Initially, I saw a result of 844mAh, which is a cut above the rated value. Next, I used the high-drain test (600mA +/-20%, with a cut-off voltage of 0.94V) to measure capacity, which is rated at 800mAh. Voltage drops slowly as the batteries are used. The Amazon Basics Rechargeable AAA 800mAh measured 1.34V. First, I measured the starting voltage, which should be a minimum of 1.2V. To test these batteries, I used an Ansmann Energy XC3000 battery tester. Next, the Amazon Basics Rechargeable AAA 800mAh are rated to keep 80% charge for two years, which is superb: you can charge today and have these batteries ready to go when you need them. If you require more longevity, then the Eneloop AAA batteries will last for more than 2000 charges but they are more expensive. While being some of the cheapest batteries you can buy, particularly if you buy in bulk, the Amazon Basics Rechargeable AAA 800mAh are an excellent choice for low-drain uses such as remote controls, and even higher-drain devices such as torches.įirst up, these batteries are rated to last for 1000 charges, which is a decent run and means that you should have a set for years before having to replace them. Will maintain 80% charge for up to two years.Image Credit (Trusted Reviews) Design and Charges If you want to buy in bulk, they’re a brilliant choice. The Amazon Basics Rechargeable AAA 800mAh do something similar: these batteries are well priced, deliver a decent level of power, and will last for up to 1000 charges. As I’ve already seen from the Amazon Basics High Capacity Rechargeable Batteries, the company has a reputation for delivering high-quality products at a low price.
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