Deals on Discount Batteries

Handy for keeping a car, motorcycle, or lawn mower battery topped off during storage since it switches to maintenance mode once fully charged, and it's currently $7.27 off the $21.50 list price. Buy Now at Amazon

These button-cell batteries work in key fobs, small remotes, and calculators, so a 10-pack is handy to have on hand for when devices die unexpectedly. Walmart has them for $5.49, which is $2.50 off the $7.99 list price. Buy Now at Walmart

Anyone building or repairing a 3S lithium-ion pack will find this useful, since it handles charging directly over USB-C at up to 2A without needing a separate power brick. It's a good pick for DIY power banks, drones, or small electronics projects where space and simplicity matter. Buy Now at Newegg

Speaker batteries lose capacity over years of charging, so this replacement is worth grabbing if your MM50 doesn't hold a charge like it used to. Newegg carries the 3,000mAh version, matching the original spec without hunting down a discontinued part elsewhere. Buy Now at Newegg

Update: The price has changed to $13.49 since this was originally published.

Rechargeable AA batteries that run at 1.5V (matching standard alkaline output rather than the lower 1.2V typical of NiMH rechargeables) are worth considering if you use devices that are sensitive to voltage drop, like certain cameras or LED lights. At $13, that's essentially the same as the list price with a penny off. Buy Now at Amazon

Two batteries at once cover you for backup systems or equipment that needs a matching set, so you're not stuck ordering a second one later when the first battery's original pair also dies. It's a practical option for alarm systems, scooters, or UPS units that call for 12V 8Ah SLA power. Buy Now at Home Depot

A tidy solution for PC builders running multiple ARGB fans who want centralized control without routing cables back to the motherboard individually — the magnetic mount and included remote keep things manageable inside a case. Buy Now at Newegg

A practical pick if your original power adapter has failed and you need a replacement without tracking down an OEM part. Buy Now at Newegg

A straightforward pick for Fujitsu Stylistic tablet owners who need a replacement charger without tracking down an OEM part at a higher price. Buy Now at Newegg

A 12V/5A adapter covers a wide range of devices that need regulated DC power, including LED strip controllers, routers, and small appliances, making this a reasonable backup or replacement option if your original adapter has failed or gone missing. Buy Now at Newegg

A straightforward pick if your HP AP5000 POS terminal needs a replacement power adapter and you'd rather spend a few dollars on a third-party option than track down an OEM part. Buy Now at Newegg

Useful for anyone building or repairing battery-powered DIY projects, this module handles both charging and voltage boosting in a single board, which cuts down on the components you need to source separately. Buy Now at Newegg

A reliable pick if your original HP Omen charger has failed or you need a spare, since third-party adapters at this wattage typically run $20 to $40 and this one is purpose-built to match the Omen's power requirements. Buy Now at Newegg

Handy for South Carolina fans who want to cut down on cable clutter, since it charges your phone, earbuds, and watch from a single pad. Buy Now at Fanatics

A practical pick if your original power adapter has failed and you need a longer cord than the standard replacement offers, since 10 feet gives you more reach than most factory cables. Buy Now at Newegg

Designed as a direct replacement for the 18V power supply that ships with the Rocketfish RF-WSP313 wireless speaker, this adapter saves you from replacing the whole unit when the original brick dies or goes missing. Buy Now at Newegg

A practical backup or replacement if your HP Chromebook charger has died or gone missing, and 65W covers most HP Chromebook models without risking underpowering the device. Buy Now at Newegg

A straightforward replacement adapter for Sony VAIO laptops running a 19.5V/75W spec, useful if your original charger has failed or you need a second one for a different location. Buy Now at Newegg

Newegg has this AC power adapter listed as a direct replacement for the Compaq Presario X1402ap, X1402us, and X1403ap, so it's a straightforward option if you've lost or damaged the original charger for one of those specific models. Buy Now at Newegg