who's got the button? You do, which means you don't have to go the drugstore when your watch, calculator, camera, radio or nearly anything else stops. Be prepared for electronic quitters with this 30-pack of button cell batteries in the most popular sizes. Our each is (6) AG1, (6) AG3, (6) AG4, (3) AG5, (3) AG12, and (6) AG13 batteries. (Some devices may call these G1, G2, etc., or have other arcane codes for these same sizes.) Brand new!

Techie Alert!  Techie Alert! This low-profile LCD readout hand-held switching power supply has constant voltage and current modes adjustable from 0.3 to 30VDC and 0-3.75A with a max 50W output. It is regulated and you can preset up to (5) V/A and there is also a dual USB 5V 2A output mode to charge your devices. The 2.9" backlit LCD display has adjustable contrast. Comes with a 6-foot power cord but you’ll need to add your own banana leads. A quality Velleman piece that doesn't come along in surplus very often. Originally sold for $149 

Knowledge is power - in this case, battery power. You'll know from the easy-to-read gauge on this black-plastic handheld mini-tester whether a battery is good, low or needs to be replaced. The 4-1/4" x 2-3/8" x 1" tester reads "AAA," "AA," "C," "D," 9 volt, 1.5 volt button, and other sizes.

These super handy little tweezer-style battery testers are made for checking button-cell and 3V lithium coin-cell batteries, but they've got a wide enough spread for everything from "AAA"s to D-cells (but not 9-volts!). Red and black arms designate the +/- sides, and an LED at the base lights up if the battery is good.

When you run out, you have to run out and buy more. Stay home with this pack of (24) "AA" and (12) "AAA" alkaline batteries from Polaroid. Box says they're good until 2021.

This power supply is made for COB LED boards, and provides constant current up to 1750mA from 10-28VDC. Features 0-10V voltage control dimming, thermistor feedback, and a separate 5-12V 2W output for a cooling fan. Has full pinout on the case. Works perfectly as a driver for COB LED lighting boards. Like these. Click! Measures 5-5/8" x 3" x 1-3/8". RoHS compliant. UL.

Can you plug in a banana? You can when you have a pair of 34” black and red leads with banana clips on one end. And these have alligator clips on the other end, so you can also plug in your reptiles, too.

Nice little battery holder made to contain (4) “AA” cells. Measures 2-1/2" x 2-3/4" x 3/4" with a pair of 5-1/2" leads and an SPST slide switch. The cover closes with screws so all those AAs won’t go flying around where you can’t find them if you drop it. Great for science fairs.

This MW® regulated power operates on 120 VAC and delivers constant accurate power to a video game, radio, portable TV, or any device drawing up to 2.0 amps. The 5 1/8" x 3-7/8" x 2-5/8" housing has a rotary dial to designate 3, 4.5, 6, 7.5, 9 or 12 VDC output, and heavy-duty red and black binding posts. Automatic short circuit and overload protection and thermal cutoff. Add the mini plug kit or the alligator test clip leads. The mini plug kit contains six of the most popular DC plugs for DC powered devices such as portable TV sets, video games and radios. "Gator" clips are 36" long with one red and one black lead.

So you like Nickel-Metal Hydride rechargeable battery bargains? You choose a 4-pack of "AA" 2600 MAH or "AAA" 1000 MAH NiMH batteries, the recommended choice for electronics, cameras, games, cordless phones and toys.

Nice, new 6-volt lantern batteries from Ultralast®, labeled for the international market. Standard 2-5/8" square x 3-3/16" high, standard spring tabs on top. Advanced Heavy-Duty the label says. We'll price it to save you a world of dollars, pesos and francs, Pat says.

The pentapack: You pick a pack of (5) 3V lithium coin cell batteries, CR2025 OR CR2032, still in their packaging, for a price that looks like a single battery, because you're smart enough to shop here. Looking for a large quantity? Try our bulk pack of (20) batteries for huge savings!

Our each is (4) of the blue plastic "D" Cell modular battery holders, approx 3-3/8" x 1-7/16" x 1-1/8" deep without tabs. They slide together either side-to-side or end-to-end or any combination of both, with connecting tabs in both directions. Can be wired parallel or in series. Open tops. Interesting possibilities.

Generic batteries that stand up to the big boys! These are very good alkaline batteries, and they seem to last just as long as the name brands when tested against them. Our each is a pack of (1), (2) or (4), depending upon the cell size.

You know all those A.S.&S. catalog items that call for AG13 or AG10 button-cell batteries? We’ve got ya covered. Our each is a package of (10) or (100), for the bulk minder shoppers, of 1.5 volt AG13s (AKA A76s, LR44s, V13Gas, and RW82s) or AG10's (AKA 389, 390, 189, L1130, LR1130, L1131) No need to thank us, we're just doing our job.

You should put buying new batteries in your calendar. These “AA” alkaline batteries, GP Ultra Plus+ brand, are marked as lasting until 2/24. You’ll get (4) packs of (2) batteries, which is (8) total, and yes, we know you just did that math in your head.

Here's a brand new selection of sealed lead-acid rechargeable batteries, for when you're pushing something a little bigger than a penlight. All batteries are all direct from the manufacturer with current date codes. All of them have (2) 3/16" wide quick-disconnect terminals on top. Click on battery description for a photo.

We have a number of battery holders, constantly changing in detail. They may be plastic, they may be metal. They all have either simple short wire leads or connection points. In all cases, they hold a number of batteries and connect them internally in series. The table shows the number and type of batteries held, the final voltage, material, lead type and price.