Lead-acid Battery

Lead-acid batteries are the most commonly used rechargeable batteries today. They also represent the oldest design with one of the worst energy per weight ratios. However, they are cheap and can supply high surge currents needed in starter motors. Every reasonably modern car uses a lead acid battery for this purpose.

Lead-acid car batteries consist of six cells of 2V nominal voltage. Each cell contains (in the charged state) electrodes of lead metal (Pb) and oxidized lead (PbO) in an electrolyte of about 37% w/w sulphuric acid (H₂SO₄). Modern designs have gelified electrolytes. In the discharged state one electrode turns into lead sulfate and the electrolyte turns into water. (This is why discharged lead-acid batteries can freeze.)

Lead acid batteries for automotive use are not designed for deep discharge and should always be kept at maximum charge, using constant voltage at 13.8V (for six element car batteries). Their capacity will severely suffer from deep cycling. Especially designed deep-cycle cells are much less susceptible to this problem, and are required for applications where the batteries are regularly discharged.

Quiescent-(Open-Circuit)-Voltage at full Battery: 12.6V
Unloading-End-Voltage: 11.8V
Charge with 13.2-14.4V
Gasing-Voltage: 14.4V
Continuous Preservation-Charge with max. 13.2V
After full Charge the Terminal Voltage will drop quickly to 13.2V and then slowly to 12.6V.

Because of the open cells with liquid electrolyte in most cheap car batteries, overcharging with excessive charging voltages will generate oxygen and hydrogen gas, forming an extremely explosive mix. This should be avoided. Caution must also be observed because of the extremely corrosive nature of sulphuric acid.

Modern Translations: Lead-acid Battery

Language		Translations for "lead-acid battery"; alternative meanings/domain in parentheses.
French		batterie rechargeable plomb-acide (rechargeable lead-acid battery). (various references)

German		wiederaufladbare Bleibatterie (rechargeable lead-acid battery). (various references)

Pig Latin		ead-acidlay atterybay
Source: compiled by the editor from various translation references.

Anagrams: Lead-acid Battery

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "a-a-a-b-c-d-d-e-e-i-l-r-t-t-y"
	-5 letters: abacterial, acetylated, altercated, calibrated, creditable, creditably, eradicable, eradicated, retaliated.
Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.