Up to 15.5 hours of battery life based on typical Surface device usage Surface Book 3 13.5” Intel® Core™ i5, 256GB, 8 GB RAM See below for more details about test parameters and estimated battery performance by product.
The following articles provide more info about battery life along with tips about how to make your battery last longer: Details for the testing can be found below by Surface device. We currently use battery life test models that reflect activities typical to a Surface user. For some of our older devices, we used a local video playback battery life test. For more information on battery care, see Caring for your Surface battery. Like all batteries, lithium-ion cells are consumables that age and deteriorate over time and with usage. The actual amount of battery life you experience can vary significantly and depends on which Surface device you have, how you use it, network and feature configuration, signal strength, and settings and other factors. In addition, users of Surface devices with lithium-ion batteries will also experience changes in battery life over time. For some products, testing is also conducted according to carrier specifications. We test Surface devices so we can provide you with an estimate of how much battery life you might expect from your Surface device.
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