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Since Sanyo introduced the Enerloop, many other brands of low-self-discharge batteries became available |
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Eneloop [[Electrochemical cell|cells]] lose their charge much more slowly than the 0.5–4% per day loss of previously available NiMH batteries, retaining about 85% of their charge for a year after charging;<ref name="ProductLineup">{{cite web|url=https://panasonic.net/energy/battery/eneloop/lineup/|title=Product Lineup|website=Panasonic.net|publisher=[[Panasonic]]|access-date=25 November 2018|archive-url=https://web.archive.org/web/20160329110936/http://panasonic.net/energy/battery/eneloop/lineup/|archive-date=29 March 2016|url-status=dead}}</ref> This allows them to be sold precharged.
Since Sanyo introduced the Enerloop, many other brands of low-self-discharge batteries became available, described as "low self-discharge","LSD", "pre-charged", or similar. By 2020 most NIMH batteries available were of this type, with varying capacity, self-discharge rate, and lifespan. Those made in Japan are all made in the same factory, but not necessarily to the same specification as the Enerloop brand.<ref>{{cite news| last=Ahsan | first=Hibba | title=4 Best AA and AAA Rechargeable Batteries in 2022 Buying Guide | newspaper=Haaretz Info & News Magazine 2022| url=https://www.haaretzdaily.com/best-rechargeable-batteries/ | access-date=29 September 2022}}</ref> There are also counterfeits of Enerloop and other well-regarded brands.
Because they can replace a large number of alkaline batteries over their life cycle, they are marketed as being eco-friendly.
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