Rechargeable: Difference between revisions
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==Cell voltages== | ==Cell voltages== | ||
[[File:Battery-sizes.jpg|thumb|Commonly used flashlight batteries. From left: AAA, AA, 18650, and 2 CR123A's]]A lot of confusion exists about battery voltage. Ordinary alkalines are rated to 1.5v, but typically are down to 1.2v when 50% used, and rapidly fall thereafter. This is why devices using alkalines often become less responsive over time, or dimmer. Rechargeable NiCad or NiMH batteries are rated to 1.2v, but will hold that until right at the end. You tend therefore to get a more consistent performance from rechargeable batteries. '''This improved consistency of voltage, is a major reason to prefer rechargeables for torch applications'''. | [[File:Battery-sizes.jpg|thumb|300px|Commonly used flashlight batteries. From left: AAA, AA, 18650, and 2 CR123A's]]A lot of confusion exists about battery voltage. Ordinary alkalines are rated to 1.5v, but typically are down to 1.2v when 50% used, and rapidly fall thereafter. This is why devices using alkalines often become less responsive over time, or dimmer. Rechargeable NiCad or NiMH batteries are rated to 1.2v, but will hold that until right at the end. You tend therefore to get a more consistent performance from rechargeable batteries. '''This improved consistency of voltage, is a major reason to prefer rechargeables for torch applications'''. | ||
==Torch circuitry== | ==Torch circuitry== | ||