![]() Figure 1: Terminal connection of a typical laptop battery The positive and negative terminals are usually placed on the outside no norm exists on the arrangement of the other contacts. Figure 1 illustrates a battery with six connections. (The one-wire system combines clock and data.) For safety reasons, a separate thermistor wire is brought to the outside. The connections are often unmarked however, the positive and negative are commonly located at the outer edges of the connector and the inner contacts accommodate the clock and data. ![]() The typical SMBus battery has five or more battery connections consisting of positive and negative battery terminals, thermistor, clock and data. Find out the challenges and limitations of repairing “smart” batteries Most laptop batteries are smart and consist of the “chemical battery” that is managed by the “digital battery.” A common protocol is the System Management Bus, better known as SMBus.
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