La Crosse 911-65557-INT Portable Digital Battery Tester,Black

I volunteer for a non-profit replacing batteries in donated watches. I also use illuminated magnifiers and flashlights to see all those tiny parts (and *find them* when they *launch* themselves across the room. So, batteries of various sizes (D, 9V, AA, AAA plus perhaps fifty sizes of silver oxide, lithium, and alkaline "button batteries) are my daily concern. This seemed to fit my needs best. To use it, simply extend the orange terminal slide out wide enough to let you place the battery against the inside terminal, push the orange slide back in till it touches the other end of the battery and read the voltage and the device's opinion as to whether the battery is dead or on its last legs. This tester is compact, doesn't require a power source, adjusts to fit almost all battery sizes, and is accurate enough to let me know if a battery has enough charge to power the watch I'm working on. It fits into my tool kit, doesn't involve any cables and is more rugged than a traditional voltmeter. And it doesn't cost much. I can't speak to its longevity, but it seems durable enough for my needs.

Check even the smallest button cell voltage. This is very handy and the cost is reasonable. Had this a week or so, used it to check rechargeable and key fob batteries. This pic is of a very tiny watch battery. Balance it on the neg side (vertical orientation of the unit) and slide the lever closed to check voltage. It worked excellent. So much easier than using a volt/ohm meter. Fun little unit.

This La Crosse battery tester is an excellent product. It works with a wide variety of voltages and chemistries. I have tried it on alkaline 1.5V (AA, AAA), USB lithium 1.5V (AA), NiMH (AA, AAA), and lithium coin cell 3V (CR2032, etc.) batteries and it appears to give timely and accurate measurements. I love that it is compact so it is easy to store and use on the go. There are a lot of battery testers on Amazon, most of which are Chinese knock offs/generics of a few designs. I appreciate that La Crosse has a unique design with a clear digital readout. You need to know what voltages mean for your particular battery chemistry (1.2V - 1.31V is considered "full" for NiMH batteries, for example), but I much prefer seeing the true voltage readout than generic terms like "good" or "empty". If you are wondering which of the forty different "caliper" or "zigzag" types of battery testers to get on Amazon, don't bother, just get this La Crosse 911-65557-INT one and be happy. The La Crosse 911-65557-INT battery tester is self-powered: powered by the battery that you are testing. There are two points to note about this design. First, if the battery you are testing is truly "dead" (below some critical threshold), nothing will display onscreen because there is no power in the first place. Second, since it is self-powered, the unit itself does not require its own battery so it will always "work" and will not get a corroded battery case because there is no battery case in the first place. If you really need to measure voltage down to the last 0.1V, this product is the wrong product for you. However, if you want to get accurate readings of batteries in various stages, this product is the best one in the price range.

Really like the all digital aspect of this battery tester. Have always hated the mechanical needle type that never seems to give an accurate reading. This lays it all out in one compact display: voltage and a better gauge of remaining life to the battery in test. Only complaint and reason for 4 stars, the contacts are not as pronounced as they could be, especially for the 9V test end. If the contacts were a bit prouder, testing a battery would be much easier. Same goes for the other end with the slider. If the contacts were a bit taller, would be easier to test button cells. Small complaint, but it doesn't detract from the general greatness of the item. LIked it so much, I ordered a second unit for my church to test the mic batteries for the headset packs and handhelds. Now, no more dropouts in the middle of services.

This little tester is easy to use, easy to read, works for all battery sizes, and definitely worth the cost.

This inexpensive and small device is simple to use and tests a wide variety of batteries. I have used it several times now and it seems to provide quick and accurate enough results. It tests everything from button cells to nine volt as well as many common small batteries like AA & AAA.

Love this so handy and easy to use

Excellent produit. Belle qualité, très compact, facile d’utilisation, grande diversité de piles dont les piles rechargeables, lecture du voltage interne et de l’énergie résiduelle, pile interne non requise pour son fonctionnement. Vaut les quelques dollars de plus.

Muy práctico probador de baterías, sirve para todo tipo, muy recomendable.

Perfect for my usage as I use all rechargeable batteries in my home especially for flash photography….doesn’t require any battery or charging for the tester

This is a very simple, versatile and effective tool for testing of batteries at home. Very easy to use and digital display bars really help to know the charge status very effectively. Great and must have tool for this digital age with 10s of batteries lying around at home for so many applications. Very reasonable priced for the quality of the product.

Es una herramienta muy sencilla pero te ayuda mucho con todas tus baterias