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Difference between revisions of "Rechargeable"
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add LiNiCoMn and 26650 size
(→Lithium Manganese (LiMn2O4) 3.7V/cell: CGR18650CH cathode has nickel) |
(add LiNiCoMn and 26650 size) |
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| '''18650''' || Roughly the size of two CR123A cells, but a little bigger in diameter. This is also a standard industry size used in laptop computer battery packs. | | '''18650''' || Roughly the size of two CR123A cells, but a little bigger in diameter. This is also a standard industry size used in laptop computer battery packs. | ||
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| '''26650''' || A fat 18650 cell | |||
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| '''26500''' || C size | | '''26500''' || C size | ||
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===Nickel-Zinc (NiZn) - 1.6V/cell=== | ===Nickel-Zinc (NiZn) - 1.6V/cell=== | ||
Introduced in 2008, Nickel-Zinc cells have already disappeared from the market. They require a special charger due to the higher nominal voltage of NiZn cells. They are 1.6V nominal, but are charged to 1.8V to 1.9V and are recharged at 1.5V. PowerGenix and Quantaray made the batteries and chargers, claiming 2500 mWh of capacity (see [[battery capacity]]). The higher voltage may make some flashlights brighter than on NiMH or Alkaline cells, but could also damage devices, especially if they use a number of AA cells in series. NiZn cells are advertised as capable of 200 full charging cycles, which is less than LSD NiMH cells. Some people found the performance of the cells to be inconsistent, while others saw good performance. In February of 2011, Powergenix said they would no longer make AA batteries and chargers and instead focus on industrial uses of larger NiZn batteries. | Introduced in 2008, Nickel-Zinc cells have already disappeared from the market. They require a special charger due to the higher nominal voltage of NiZn cells. They are 1.6V nominal, but are charged to 1.8V to 1.9V and are recharged at 1.5V. PowerGenix and Quantaray made the batteries and chargers, claiming 2500 mWh of capacity (not mAh, see [[battery capacity]]). The higher voltage may make some flashlights brighter than on NiMH or Alkaline cells, but could also damage devices, especially if they use a number of AA cells in series. NiZn cells are advertised as capable of 200 full charging cycles, which is less than LSD NiMH cells. Some people found the performance of the cells to be inconsistent, while others saw good performance. In February of 2011, Powergenix said they would no longer make AA batteries and chargers and instead focus on industrial uses of larger NiZn batteries. | ||
===Lithium Ion (Li-ion) - 3.7V/cell=== | ===Lithium Ion (Li-ion) - 3.7V/cell=== | ||
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These cells allow higher drain ([[Terminology#C|5C]], up to 8C) than LiCo cells without some of the dangers. AW sells these as IMR (supposedly based on "LMR" for lithium manganese rechargeable, but the lower case "L" was mistaken for an "I" and never corrected), and Sony as Konion. They can be charged in most li-ion chargers, but some li-ion chargers will overcharge LiMn cells. LiMn cells should be charged at 1C to 2C. Due to lower overall capacity, these batteries fill a niche with flashlights demanding very high current where runtime isn't that important. While they are safer than lithium-ion cells (therefore they do not come with protection circuits), they can still be made to explode if provoked sufficiently, unlike the LiFePO<sub>4</sub> cells which cannot. As a budget alternative to AW or Sony cells, [http://www.bestinone.net/index.php?route=product/search&keyword=imr&category_id=0 Best In One] has generic LiMn cells in a number of sizes. These cells are also sold in the US by Shaotech at [http://www.shaotech.com/ his store] and on CPF Marketplace. | These cells allow higher drain ([[Terminology#C|5C]], up to 8C) than LiCo cells without some of the dangers. AW sells these as IMR (supposedly based on "LMR" for lithium manganese rechargeable, but the lower case "L" was mistaken for an "I" and never corrected), and Sony as Konion. They can be charged in most li-ion chargers, but some li-ion chargers will overcharge LiMn cells. LiMn cells should be charged at 1C to 2C. Due to lower overall capacity, these batteries fill a niche with flashlights demanding very high current where runtime isn't that important. While they are safer than lithium-ion cells (therefore they do not come with protection circuits), they can still be made to explode if provoked sufficiently, unlike the LiFePO<sub>4</sub> cells which cannot. As a budget alternative to AW or Sony cells, [http://www.bestinone.net/index.php?route=product/search&keyword=imr&category_id=0 Best In One] has generic LiMn cells in a number of sizes. These cells are also sold in the US by Shaotech at [http://www.shaotech.com/ his store] and on CPF Marketplace. | ||
===Lithium Manganese Nickel (LiNiCoMn) 3.7/cell=== | |||
Similar to IMR cells above, and sometimes called INR, these batteries fall somewhere between LiCo and LiMn cells in safety. They do not usually have protection circuits, are not subject to thermal runaway, and are capable of high discharge rates. Panasonic makes 2250mAh cells that have the product number CGR18650CH and are available from [http://callieskustoms.com/CalliesKustoms-Batteries.html Callie's Kustoms] or [http://www.intl-outdoor.com/panasonic-cgr18650ch-2250mah-liion-battery-p-291.html International Outdoor]. They do not usually have protection circuits but are not subject to thermal runaway like normal LiCo cells, and are capable of discharge rates of up to 10 amps. International Outdoors sells INR cells in 26650 size. | |||
===Lithium-Polymer (Li-Poly) - 3.7V/cell=== | ===Lithium-Polymer (Li-Poly) - 3.7V/cell=== | ||