A battery with a 2600 mAh rating might be expected to provide: 2.6 amps (2600 milliamps) for an hour; or. 0.26 amps for 10 hours; or. 26 amps for a tenth of an hour. In real world performance, a higher current demand will decrease the available current by a bit, so the 6 minutes at 26 amps may be optimistic.
Prefer an on-line spinner calculator? This ''lite'' version of the full spreadsheet runs in your browser window and calculates weapon mass, moment of inertia, stored kinetic energy, and spin-up time. Like the full Excel spreadsheet, this calculator has been updated to include an estimate of battery resistance in its calculations.
"The car battery remains the greatest barrier and most promising opportunity to bringing EVs mainstream," said Aaron Knobloch, principal investigator and mechanical engineer at GE Global Research. "Improvements in the range, cost and life of the battery will all be needed for EVs to be competitive.
"The car battery remains the greatest barrier and most promising opportunity to bringing EVs mainstream," said Aaron Knobloch, principal investigator and mechanical engineer at GE Global Research. "Improvements in the range, cost and life of the battery will all be needed for EVs to be competitive," he added.
Hoping to address the major drawback to owning an electric car -- the battery life-- GE (IW 500/5) researchers, in partnership with Ford Motor Co. (IW 500/6) and the University of Michigan, will develop a smart, miniaturized sensing system .
"The car battery remains the greatest barrier and most promising opportunity to bringing EVs mainstream," said Aaron Knobloch, principal investigator and mechanical engineer at GE Global Research.
"Improvements in the range, cost and life of the battery will all be needed for EVs to be competitive," he added. "With better sensors and new battery analytics, we think we can make substantial progress at increasing battery life. This, in turn, could help bring down its overall cost and the cost entitlement of buying an electric car."
The goal of this 3-year, $3.1 million program is to demonstrate a working sensing system in an actual electric vehicle.
The objective of the ARPA-E project will be to develop small, cost effective sensors with new measurement capabilities. Due to their small size, these sensors will be placed in areas of the battery where existing sensor technologies cannot be currently located. The combination of small size and ability to measure new quantities will enable a much better understanding of battery performance and life.
GE''s role will be to combine a novel ultrathin battery sensor system with sophisticated modeling of cell behavior to control and optimize battery management systems. Today''s sensors on EVs and plug-in hybrid vehicles (PHEVs) measure the health of the battery by looking at factors such as its temperature, voltage, and current. However, these measurements provide a limited understanding of a battery''s operation and health.
A group of scientists from the University of Michigan, led by Anna Stefanopoulou, a professor of mechanical engineering, will use the data generated by GE sensors to verify advanced battery models. They will ultimately create schemes that use instantaneous sensor data to predict future battery-cell and battery-pack behavior.
"Ensuring a battery''s health over many cycles requires taking frequent snapshots of its condition as it ages," said Charles Monroe, a chemical engineering professor on the University of Michigan team. "Control systems on cars have to be able to use this vast amount of data quickly and efficiently. Information provided by advanced sensors will allow us to create and verify finely resolved physical models to underpin battery management schemes."
The use of sensors in conjunction with real-time models will enable novel algorithms that optimize how the battery system is managed to extend its life. To demonstrate the capabilities of the sensor system and analytics, Ford will integrate them into one of their vehicles for validation.
"This collaboration brings together a diverse set of experts on sensor technology, controls and modeling, and automotive engineering to innovate on some of the most critical elements of battery technology," said Tony Philips, senior technical leader, Vehicle Controls, Research and Engineering, Ford Motor Co.
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Lenovo benchmarked its upcoming Yoga Slim 7i Aura Edition, which is thin and light, against Apple''s previous generation M2 and M3 MacBooks. The Lunar Lake-powered Yoga Slim reportedly outperformed Apple''s M3 MacBook by 5 hours and 22 minutes and Apple''s M2 counterpart by 5 hours and 35 minutes.
Testing was done at 150 nits display brightness with the wifi and keyboard backlights off on all three laptops. The video was a locally run H.264 at 24 FPS at 1080P. The Yoga Slim 7i Aura Edition had a Core Ultra 7 258V Lunar Lake CPU with 32GB of RAM running on Windows 11 24H2. The Apple M2 Macbook Lenovo tested was running with Apple''s vanilla M2 processor with 8GB of RAM on MacOS Sonoma. The M3 counterpart was running on the vanilla M3 chip with 24GB of RAM and the same Mac OS.
Lenovo''s in-house battery life tests back Intel''s claim that Lunar Lake will provide better battery life than competing ARM-based laptops, which are Intel''s main threat, especially now that they exist on Macbooks and Windows-based machines simultaneously thanks to the introduction of Qualcomm''s new Snapdragon X CPUs.
Lenovo''s results aren''t even the best we''ve seen so far from the plethora of Lunar Lake laptops coming soon. Acer is claiming up to 29 hours of battery life on a 65WHr battery and IPS LCD screen for some of its upcoming notebooks. Asus is claiming up to 29 hours for its upcoming Expertbook devices, and Dell is claiming up to 26 hours of Netflix playback on its forthcoming Lake Lunar laptops.
The Lenovo Yoga Slim 7i Aura Edition is a new variant powered exclusively by Core Ultra 7 Lunar Lake CPUs. The laptop features a 15.3-inch form factor sporting a 70WHr battery, WiFi 7, up to 32GB of LPDDR5X 8533MHz RAM, 1TB M.2 PCIe Gen 4 SSD, and an 1800p 120Hz LCD screen. Its starting price is $1,279.99.
Aaron Klotz is a contributing writer for Tom’s Hardware, covering news related to computer hardware such as CPUs, and graphics cards.
$25 active memory cooler reduces temperatures of ''naked'' RAM by up to 41% — Corsair Vengeance Airflow cooler prevents 768GB DDR5-6400 of server RAM from overheating
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Battery life is one of the most important aspects to consider when purchasing a laptop; it can be annoying tocontinually look for a power outlet to charge your device, especially when you''re out and about. Thankfully, many laptops have fantastic battery life as CPUs, SoCs, and other components become increasingly more power-efficient. Battery life isn''t the only thing you need to consider when buying a laptop, though, as a poor user experience or sluggish performance can still make a laptop with incredible battery life near unusable, so it''s important to weigh each model''s pros and cons. Also, remember that the configuration can greatly affect a laptop''s battery life.
We''ve bought and tested over 140 laptops. Below, you''ll find our picks for the best laptops forbattery life you can buy. You can also see our recommendations for the best 15-16 inch laptops, the best travel laptops, and the best Windows laptops.
A quick note about the new M4 MacBook Pros: Apple has released new MacBook Pros with its M4 chips. They have even more processing power, a brighter display (up to 1000 cd/m² in SDR), Thunderbolt 5 support, and a higher-resolution webcam. We''ve purchased a 14-inch and 16-inch model and will begin testing them soon, so stay tuned!
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