prompter: Can you charge an 11 volt laptop battery with a 12 volt power supply?

assistant: It is generally not recommended to charge a laptop battery with a power supply that has a higher voltage than what is specified for the battery. Using a 12-volt power supply to charge an 11-volt laptop battery can potentially damage the battery or the device it powers. It's best to use a power supply with the correct voltage for your laptop battery, which is usually specified on the battery itself or in the device's manual. If you're unsure, it's best to consult with a professional or manufacturer to avoid any potential harm to your device.

prompter: Assume that I do not have the funds to purchase a new - proper - power supply. Can you tell me common places I could reliably find cheap, used power supplies?

assistant: You should check the computer battery specifications, sometimes there is a chance of that being feasible, however, I wouldn't try it if the computer contains valuable information

prompter: What are the specifications for a Lenovo Thinkpad T440, will it safely charge on 11 volts?

assistant: The specifications for the Lenovo ThinkPad T440 state that the laptop requires an input voltage of 20V and an input current of 3.25A for charging the battery. An 11V power supply would not be compatible with the specifications, and I would not recommend using an 11V power supply to charge the battery. Doing so could cause damage to the battery or the laptop and may also pose a safety risk. It is always best to use a power supply that is specifically designed for your laptop and meets the specifications listed in the manual or on the manufacturer's website.

assistant: The Lenovo ThinkPad T440 is a 14-inch laptop released in 2014, and its specifications are as follows:

Processor: Intel Core i5 or i7 4th Generation
Memory: Up to 16GB DDR3L
Storage: Up to 1TB Hard Drive or 256GB SSD
Display: 14.0 inch HD (1366x768) LED backlight
Graphics: Intel HD Graphics 4600
Ports: 3 x USB 3.0, VGA, Mini DisplayPort, Ethernet (RJ-45), Dock connector, Headphone / microphone combo jack
Battery: Up to 9 hours with 6-cell battery
Weight: Starting at 4.18 lbs (1.9 kg)

Regarding charging, the T440 has a 20V 65W power adapter, and therefore 11 volts is not enough to safely charge the laptop. It is recommended to only use the original power adapter that came with the laptop, or a compatible replacement adapter, to ensure the proper and safe charging of the battery.

assistant: The AC Adapter is for 20V output. [1] [2].
[1[ https://www.amazon.com/GHU-Adapter-Compatible-ThinkPad-Chromebook/dp/B079DNSK6W/
[2] https://www.amazon.com/Jeestam-Charger-Thinkpad-4X20E50574-ADL170NLC2A/dp/B08CVBGNFK/

assistant: Probably. Electronics can often survive double the voltage of what they are rated for, but it is not recommended!

prompter: What method would you recommend for doing so? Like connecting then reconnecting much sooner or some other method to mitigate the risk?

prompter: Can anything bad happen to the laptop?

assistant: Yes, charging a battery with a higher voltage may lead to several problems, such as overcharging, short-circuits, reduced battery life, swelling, leakage, and in severe cases, even explosions.