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A D cell may be either rechargeable or non-rechargeable. Its terminal voltage and capacity depend upon its cell chemistry. The National Carbon Company introduced the first D cell in 1898. Before smaller cells became more common, D cells were widely known as flashlight batteries. The U.S. military designation for this battery has been BA-30 ...
A larger format for e-bikes and transport. Used in some flashlights. Higher capacity than traditional 26650 cells. 32600 [230] 3,000–6,100 [231] 32: 60 About the same dimension as a D cell. 32650 [232] 5,000–6,500 [233] 32: 67.7 Occasionally found in larger LED flashlights. 32700: 7,000 32: 70 LiFePO4 cells. [234] 38120: 38120s, 38120HP ...
Cell chemistry Also known as ... NiMH Ni-MH Metal hydride: KOH Yes 1990 [1] ... 6,000–30,000 to 90% capacity Lithium iron phosphate: 90
The only numerical designation was the 6-inch tall "No. 6" cell. The older "No. 1" through "No. 5" batteries were discontinued, each being 1 to 5 inches high respectively, although the similarly sized Burgess No. 1 (C cell) and No. 2 (D cell) were still produced under that name through the 1950s.
Low-self-discharge cells have somewhat lower capacity than otherwise equivalent NiMH cells because of the larger volume of the separator. The highest-capacity low-self-discharge AA cells have 2500 mAh capacity, compared to 2700 mAh for high-capacity AA NiMH cells. [37]
The batteries find suitable applications in low-drain devices such as remote control 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.
A variety of standard sizes of primary cells. From left: 4.5V multicell battery, D, C, AA, AAA, AAAA, A23, 9V multicell battery, (top) LR44, (bottom) CR2032 A primary battery or primary cell is a battery (a galvanic cell) that is designed to be used once and discarded, and it is not rechargeable unlike a secondary cell (rechargeable battery).
Data sheets for rechargeable cells often list the discharge capacity on 8-hour or 20-hour or other stated time; cells for uninterruptible power supply systems may be rated at 15-minute discharge. The terminal voltage of the battery is not constant during charging and discharging.