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Eneloop

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devices and alarms, where low capacity is not an issue. The AAs have 1,000 mAh of capacity, while the AAAs have 600 mAh. Due to reduction of the capacity compared to the regular Eneloop cells, the charging time is halved for the AA and reduced by 25% for the AAA. On the other hand, they can be recharged 3,000 times. The reduction in capacity also reduced the production cost, which decreased the initial investment for rechargeable batteries. They also weigh 30% less. The product numbers are HR-3UQ (AA) and HR-4UQ (AAA).
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Along with the upgrade of the regular Eneloop cells in April 2013, the Lite version was also upgraded. According to Panasonic, it can now be recharged up to 3,000 times (life cycles for DOD 60%) (model numbers BK-3LCC for the AA and BK-4LCC for the AAA battery). The upgraded batteries also retain 90%
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In January 2013, Sanyo announced the second generation of Eneloop XX (model HR-3UWXB, or Panasonic BK-3HCC), branded Eneloop Pro. The new generation has a 50 mAh higher capacity (2,550 mAh nominal, 2,450 mAh minimum capacity), and the self-discharge rate was improved, retaining 85% up
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Since Sanyo introduced the Eneloop, 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
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thermistor built-in that cuts the power in case of overheating. This makes them especially suitable for toys and devices that generate significant heat. Other specifications are identical to the second-generation Eneloop batteries. The product number is HR-3UPT (AA), and the battery was released in
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A fifth generation was introduced in 2022 (manufactured from at least April 2021). The minimum (guaranteed) capacity was increased from 1900 to 2000 mAh for AA (BK-3MCDx) and from 750 to 800 mAh for AAA (BK-4MCDx) models. These batteries are supposed to hold up to 70% of their charge after 10 years
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In October 2011 the batteries were again improved to retain up to 90% of their capacity after one year, 80% after three years and 70% after five years. The batteries can be recharged up to 1,800 times, rather than the 1,500 times of the previous revision. The part numbers for third generation cells
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Sanyo introduced C- and D-sized Eneloop batteries with a minimum capacity of 2,700 mAh and 3,000 mAh respectively in 2009, along with a new universal charger. As these sizes were only available in Japan and Singapore, Sanyo offered adapter sleeves to fit AA batteries in devices that take
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somewhat lower capacity for much slower self-discharge. The trade-off was modified for the Eneloop Pro series, providing higher capacity but with more self-discharge and shorter lifespan. The Eneloop Lite series traded significantly lower capacity for longer lifespan, and also faster charging and
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After NIMH rechargeable batteries were introduced, they were developed to increase capacity. This was done by using thinner insulators internally, allowing more of the active components to be used and thus increasing capacity. The thin insulators allowed significant leakage, leading to relatively
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in the US, Canada, and Europe) series was introduced in 2011. They have a higher capacity than regular Eneloop cells, 2,500 mAh (min. 2,400 mAh) for AA. They retain 75% of their initial charge after one year, and can be recharged 500 times, significantly less than the standard non-Pro
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line was released in Japan in June 2010. They addressed two disadvantages of alkaline and other NiMH batteries: the initial cost and the long charging time—both achieved by reducing the capacity of the battery. The batteries find suitable applications in low-drain devices such as remote control
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The Eneloop is the standard general-purpose cell. The cheaper Eneloop Lite has lower capacity and a longer lifespan in charge cycles, but the standard and Lite of about the same time have very similar total lifetime capacity in watt-hours. The more expensive Eneloop Pro has significantly higher
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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; This allows them to be sold precharged. Since then many other makes of NiMH batteries are supplied precharged, with long charge
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to one year. They also introduced an AAA version of the Eneloop XX (model HR-4UWXB) with a nominal capacity of 950 mAh (900 mAh minimum). After the acquisition by Panasonic, they were renamed Eneloop Pro (model BK-4HCC) in Europe (BK-4HCCE) and the Americas (BK-4HCCA).
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Following the acquisition of Sanyo by Panasonic, a fourth generation was introduced in April 2013. The number of charges per cell was increased from 1800 to 2100 cycles for both AA (BK-3MCC) and AAA (BK-4MCC) models. In some countries the batteries are branded as Panasonic.
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of the charge after one year like the regular Eneloop cells. Packaging is marked prominently 'Best for DECT' certainly in European markets, suggesting that these batteries are suitable for 'nearly always on charge' applications such as home cordless phones.
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batteries was introduced in 2010. It endured 1,500 recharge cycles for depth of discharge (DOD) 60% and held 85% of the charge after one year and 75% after three years. The part numbers for second generation cells are HR-3UTGA (AA) and HR-4UTGA (AAA).
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capacity and is suitable for higher-current applications, but has poorer charge retention and shorter lifespan in charge cycles; total lifetime capacity in watt-hours is much less than the other versions. Numerical data are listed in the
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are HR-3UTGB (AA) and HR-4UTGB (AAA). At the same time, the C- and D-sized Eneloop batteries' stated minimum capacities were increased to 3,000 mAh and 5,700 mAh respectively. They were available in Japan from November 2011.
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The original Eneloop Batteries were designed and developed by a battery factory. Panasonic bought the Eneloop brand, while Fujitsu, as part of its FDK subsidiary, owned the factory and all the IP associated with the manufacture of
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and 800 mAh. They could be recharged 1,000 times and held up to 75% of their charge after one year. The part numbers for first generation cells are HR-3UTG (AA) and HR-4UTG (AAA).
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In October 2015, Panasonic remodeled Eneloop Pro (BK-3HCD/BK-4HCD). The minimum capacity of the battery increased, by 50 mAh to 2500 mAh for AA and by 30 mAh to 930 mAh for AAA.
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Sanyo Announces New "eneloop" Rechargeable Batteries – Industry No. 1 Rechargeable Batteries – Rechargeable up to "Approx. 1,500 times", Factory Pre-charged using Solar Power
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Sanyo introduces new eneloop with 1800 life cycles to European market – Longer capacity with added life span: new eneloop keeps up to 70% of power after 5 years of storage
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Because they can replace a large number of alkaline batteries over their life cycle, Eneloops are marketed as being eco-friendly.
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acquired a majority stake in Sanyo in 2009, and Eneloop batteries were thereafter branded, but not manufactured, by Panasonic.
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Japan are all made in the same factory, but not necessarily to the same specification as the Eneloop brand. There are also
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section. The discontinued Eneloop Plus was similar to the standard Eneloop, with overheating protection.
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Panasonic retained the "Eneloop" trademark, sourcing the batteries from FDK (formerly Sanyo) factories.
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approval of the takeover, Panasonic agreed to sell Sanyo's portable NiMH battery business to
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Sanyo Energy Unveils New Eco-Friendly Products To The Singapore Market
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Eneloop line. The product numbers are HR-3UWX (AA) and HR-3UWXA (AA).
1848:"Sanyo Adds "Eneloop Lite" to "Eneloop" Rechargeable Battery Family" 293:
A newer Panasonic Eneloop (top) and older Sanyo AA Eneloop batteries
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New Eneloop XX with Higher Capacity and Improved Low Self-Discharge
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subsidiary FDK in order to preserve competition, and later did so.
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European models went on sale from the beginning of October 2012.
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Panasonic Eneloop Pro AA 2500 mAh batteries, type "BK-3HCDE".
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Sanyo was acquired by Panasonic in 2009. In exchange for US
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against poorer charge retention and shorter lifespan.
1743:"Panasonic Eneloop vs IKEA LADDA – Are They The Same?" 1653:
pre-charged ... will stay charged for up to 12 months
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times. Eneloop batteries were designed in a way that
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The Eneloop Pro family have higher capacity in mAh,
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Eneloop 5th anniversary special glitter edition pack
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Panasonic's fourth-generation Eneloop batteries, in
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Panasonic Eneloop Smart & Quick Charger BQ-CC55
115: 107: 97: 89: 71: 63: 55: 45: 35: 302:The original Eneloop batteries were introduced in 1598: 1596: 1594: 1592: 1590: 1588: 1586: 1584: 182: 1879: 1877: 1875: 278: 2361: 8: 21: 1967: 1965: 228:of Eneloop and other well-regarded brands. 2553: 2387: 2368: 2354: 2346: 1568: 1566: 1052: 498: 27: 20: 1105:Ordinary NiMH battery (Sanyo NiMH 1000) 551:Ordinary NiMH battery (Sanyo NiMH 2700) 1836:Eneloop 2022 product catalog for Europe 1689: 1687: 1562: 198:low self-discharge nickel–metal hydride 1671:Haaretz Info & News Magazine 2022 16:Japanese rechargeable batteries brand 7: 2865: 310:size, with capacities of 2,000  1978:. Sanyo Electric Co. Archived from 1853:. Sanyo Electric Co. Archived from 14: 322:The second generation of Eneloop 2864: 2855: 2854: 2472: 2263:"Sanyo's Eneloop Lite datasheet" 2080:"Sanyo's Eneloop Lite datasheet" 1973:"Sanyo's Eneloop Lite Datasheet" 442:XX powered by Eneloop Technology 2459:Universal Lighting Technologies 1694:Tarr, Greg (24 November 2009). 1573:Rockwell, Ken (6 March 2022) . 111:"Recharging a better tomorrow." 2906:Nickel–metal hydride batteries 2901:Consumer battery manufacturers 2461:(sold to Atar capital in 2021) 2398:Panasonic Avionics Corporation 1: 204:and accessories developed by 161:Sanyo Eneloop battery charger 2916:Panasonic Corporation brands 1392:Eneloop Lite 2nd generation 1351:Eneloop Lite 1st generation 838:Eneloop Lite 2nd generation 797:Eneloop Lite 1st generation 2891:Products introduced in 2005 2670:Panasonic Toot-a-Loop Radio 1638:"Rechargeable AA Batteries" 1433:Eneloop Pro 2nd generation 924:Eneloop Pro 2nd generation 879:Eneloop Pro 1st generation 183: 2932: 2445:(spun off and merged with 2403:Panasonic Cycle Technology 2850: 2470: 2299:"Eneloop Pro 2012 models" 2188:"Eneloop Pro 2012 models" 1575:"Sanyo Eneloop Batteries" 1515:Panasonic Eneloop Pro XX 1073: 1070: 1067: 1064: 1061: 1058: 1055: 519: 516: 513: 510: 507: 504: 501: 490:Variant comparison tables 486:Japan in December 2011. 279:variant comparison tables 174: 26: 2720:Micro Four Thirds system 2408:Panasonic Electric Works 1071:Est. lifetime cap. (Wh) 517:Est. lifetime cap. (Wh) 412:Eneloop Pro (Eneloop XX) 208:and introduced in 2005. 2832:Panasonic Toyota Racing 2152:"Announcement HR-3UWXA" 1310:Eneloop 5th generation 1269:Eneloop 4th generation 1228:Eneloop 3rd generation 1187:Eneloop 2nd generation 1146:Eneloop 1st generation 756:Eneloop 5th generation 715:Eneloop 4th generation 674:Eneloop 3rd generation 633:Eneloop 2nd generation 592:Eneloop 1st generation 2837:Panasonic Gobel Awards 2827:Panasonic cycling team 2822:Panasonic Wild Knights 1474:Panasonic Eneloop Pro 1068:Max. cycles (DOD 60%) 1006:Panasonic Eneloop Pro 965:Panasonic Eneloop Pro 514:Max. cycles (DOD 60%) 467: 421: 356: 294: 202:rechargeable batteries 162: 154: 146: 77:; 18 years ago 2896:Battery manufacturers 2703:Formats and standards 465: 419: 354: 292: 160: 152: 136: 1889:Panasonic-Eneloop.eu 1059:Model number prefix 505:Model number prefix 381:of storage at 20°C. 193:, is a brand of 1.2- 40:Rechargeable battery 2776:Masayuki Matsushita 2771:Masaharu Matsushita 2766:Kōnosuke Matsushita 2665:Panasonic JR series 2455:(sold to Seagram's) 2243:on 22 December 2015 2168:on 19 November 2012 2060:on 22 December 2015 1985:on 17 February 2013 1706:on 10 February 2019 1313:BK-4MCD (BK-4MCDE) 1272:BK-4MCC (BK-4MCCE) 759:BK-3MCD (BK-3MCDE) 718:BK-3MCC (BK-3MCCE) 272:Variant description 23: 2428:(acquired in 2021) 2422:(acquired in 2007) 2420:Anchor Electricals 2416:(acquired in 2009) 2410:(acquired in 2012) 2132:on 29 October 2013 1938:on 29 October 2013 1899:on 7 December 2014 1805:on 29 October 2013 1731:. 28 October 2009. 468: 422: 357: 295: 163: 155: 147: 2878: 2877: 2842:Panasonic Impulse 2698: 2697: 2468: 2467: 2279:on 9 October 2012 2096:on 9 October 2012 1860:on 5 October 2013 1555: 1554: 1074:Charge retention 1046: 1045: 520:Charge retention 131: 130: 2923: 2868: 2867: 2858: 2857: 2685:Panasonic TR-005 2599:Technics SL-1200 2554: 2476: 2475: 2388: 2370: 2363: 2356: 2347: 2342: 2341: 2339:Official website 2325: 2324: 2322: 2320: 2315:on 12 April 2013 2314: 2308:. 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Archived from 1604:"Product Lineup" 1600: 1579: 1578: 1570: 1053: 499: 426:trading this off 420:Sanyo Eneloop XX 188: 186: 176: 127: 124: 122: 85: 83: 78: 56:Produced by 31: 24: 2931: 2930: 2926: 2925: 2924: 2922: 2921: 2920: 2911:Japanese brands 2881: 2880: 2879: 2874: 2846: 2800: 2786:Hirofumi Hirano 2781:Hiro Matsushita 2754: 2694: 2613: 2585: 2545: 2477: 2473: 2464: 2431: 2379: 2374: 2337: 2336: 2333: 2328: 2318: 2316: 2312: 2301: 2297: 2296: 2292: 2282: 2280: 2276: 2265: 2261: 2260: 2256: 2246: 2244: 2227: 2226: 2217: 2207: 2205: 2201: 2190: 2186: 2185: 2181: 2171: 2169: 2165: 2154: 2150: 2149: 2145: 2135: 2133: 2129: 2118: 2114: 2113: 2109: 2099: 2097: 2093: 2082: 2078: 2077: 2073: 2063: 2061: 2044: 2043: 2034: 2024: 2022: 2021:on 17 June 2009 2018: 2007: 2003: 2002: 1998: 1988: 1986: 1982: 1975: 1971: 1970: 1963: 1955: 1951: 1941: 1939: 1935: 1924: 1920: 1919: 1912: 1902: 1900: 1883: 1882: 1873: 1863: 1861: 1857: 1850: 1846: 1845: 1841: 1834: 1830: 1822: 1818: 1808: 1806: 1802: 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