Eneloop: Difference between revisions

[[File:Duraloop.jpg|thumb|300px|Comparison of white-top Duracell Precharged and Eneloop AA cells]]Panasonic's Eneloops are low self-discharge (LSD) NiMH [[rechargeable]] batteries first introduced in 2005 (made by Sanyo, which Panasonic took over). They have a nominal capacity of 2000 [[Terminology#mAh|mAh]] in the AA size and 800 mAh in AAA size. They seem to perform better than any other LSD cells ([http://www.candlepowerforums.com/vb/showthread.php?t=149804 Eneloop Self-Discharge Study] [http://candlepowerforums.com/vb/showthread.php?t=151183 Eneloop vs. Rayovac Hybrid] [http://www.candlepowerforums.com/vb/showpost.php?p=2955510&postcount=271 Eneloop vs. Imedion]). While most LSD cells retain 75-80% of their charge after a year, Eneloops can retain 85%. They are very consistent in their performance, retain their original capacity better after many cycles, and deal well with high drain applications (like a flashlight on "turbo"). Therefore if you ask on the forums what kind of battery to buy, you will be told to buy Eneloops. That said, the other brands also perform well, just not quite as well as Eneloops. If money is an issue, try other brands of LSD cells, which can sometimes be purchased for as little as $1 each on a good sale.

In 2010 second generation Eneloops began showing up promising 1,500 charging cycles vs. 1,000 cycles for the earlier versions <ref>[http://www.eneloop.info/news-archive/news-archive/details-eneloop-news/ad/397.html SANYO announces the release of the upgraded AA- and AAA-size eneloop], Sanyo press release, May 6, 2010</ref>. The packaging clearly indicates that the new batteries can be charged 1,500 times and the batteries themselves feature a crown graphic on the label. The product number ends with "A" (e.g. HR-3UTGA).

 

 

'''Duracell''' The term "duraloop" (a [[Terminology#CPF|CPF]] nickname, not an official name) refers to Duracell precharged cells (currently labeled "StayCharged") that are made in Japan and are white around the positive button just like Eneloops, and in fact are thought to be Eneloops re-badged as Duracells. Other Duracell precharged cells have a black top and are made in China, and are not called "duraloop." Duracell also makes non-LSD NiMH batteries (not marked precharged, usually 2450 or 2650 mAh) which may have a green top.

 

 

 

 

The Eneloop brand has diversified into light blue '''Eneloop Lite''' cells with less capacity (950 mAh for AA cells and 550 mAh for AAA) and supposedly less cost, designed for use in low-drain devices like remotes. Sanyo claims these lighter weight versions of Eneloops can be recharged 2,000 times. Introduced in June 2010<ref>[https://eneloop101.com/wp-content/uploads/2017/03/eneloop-lite-announcement.pdf Eneloop Lite product announcement] March 8, 2010</ref>.

In late 2010, Sanyo introduced black '''Sanyo XX''' cells using Eneloop technology (higher capacity than Eneloops at 2500 mAh for AA, but not as low self-discharge: more like 75% after a year and said to be good for 500 cycles). These were marketed primarily in Europe. They also appeared in metallic orange wrappers, labelled '''Harmolattice''', marketed in Southeast Asia, <ref>[http://exposureworks.wordpress.com/2011/01/04/sanyo-eneloop-harmolattice-2500mah-batteries/ Exposure Works], 4 January 2011.</ref> but Harmolattice batteries are not precharged. In 2011, Eneloop XX batteries were renamed '''Eneloop Pro''' in Japan but keep the black wrapper<ref>[https://eneloop101.com/wp-content/uploads/2017/03/Anncouncement-Pro-and-Plus.pdf Eneloop Pro and Plus product announcement] June 9, 2011</ref>. In October 2012, the Eneloop Pro was expanded to AAA size with a capacity of 900mAh, available outside of Japan as Sanyo XX or Eneloop XX. In April 2013, Eneloops will be labelled Panasonic.

The '''Eneloop Plus''' was introduced at the same time as the Eneloop Pro. The Plus has a thermistor that monitors temperature of the battery and will cut off power in case of a dead short or if batteries are inserted incorrectly.