Kratax 9v Rechargeable Batteries 2 Count 850mAh Rechargeable 9 Volt Lithium Batteries, 1000 Cycles Long Lasting for Smoke Alarms, Guitar, Microphones-Charger NOT Included

So far, these are working perfectly! Good price, appear to be of excellent quality, charge easily. No complaints!!

Works great I the church microphone

These high capacity have enough voltage to power anything that uses a 9 volt?

I bought these to use in my Taylor guitar. They are bigger than Duracell and I broke the plastic battery holder trying to put one in. Edit: To their credit, the seller offered a full refund. After doing some research regarding batteries in Taylor guitars, it turns out there was a known issue with the battery holder being too tight for some batteries. While my original statement is true, the replacement battery holder from Taylor is big enough that these batteries fit fine. For this reason I decided not to get the refund and increase stars.

16APR25 Of the four, 3 measured better than 850mAh and one a not too bad 822mAh (see photo). I used a 100mA charging and discharging rate. Using a RC3563 battery tester to measure resistance I found a nominal 150mΩ value. This is the lowest value I've ever seen in a 9V. I'm not sure whether, or not, the battery's internal circuitry will, non destructively, protect things in a short circuit situation. That's 60A!!

Good batteries. Powers wireless mic for a long time.

I have a large metal detector and a smaller pointer "wand-style" metal detector for pinpointing the location of buried objects. The wand-style detector uses 9V batteries. I ordered these Kratax 850mAh High Capacity 9volt 6F22 Lithium-ion Batteries with USB charger so that I can have a fresh set of batteries with me when detecting. These batteries last as long as disposable alkaline batteries in my detector and are far less expensive over time, given that they have a life expectancy of two to three years or more. The charger plugs into any powered USB port and will charge all four batteries in a few hours. Overall, I'm quite pleased with these batteries and charger. They offer good service and value for the price.

One recharges perfectly, the secondary battery has never taken on a full charge so it useless to me.

Cette Pile Lithium Ion rechargeable convient parfaitement pour remplacer les piles 9 volts alcalines Les dimensions sont identiques ou presque aux piles 9 volts alcalines Dimensions Piles Alcaline 26 x 16.8 x 47.8mm vs Kartax 26 x 16 x 48mm Capacité d'une marque connue de qualité conventionnel 9 Volts est de 580 mAh vs Kratax 8.4-8.7 Volts Valeur réel 790-800 mAh donc très près de la valeur de 850 mAh spécifié. Donc la Pile Kratax Lithium Ion rechargeable 9 Volts offre une meilleure performance de plus de 36% que la meilleure pile 9 Volt Alcaline conventionnelle. J'ai évalué Plusieurs autres Marques de Li-Ion 9 volts rechargeable et Kratax 9 Volts est la seule pile qui rencontre les spécifications tant qu'à sa Capacité et les dimensions en plus d'être facilement rechargé avec le chargeur rapide inclus.

J'utilise ce type de pile 9volts pour un Tens. La durabilité et l'économie sont excellente.

When the batteries are fully charged I get a max of 8.62V. They are being used for smoke detectors so it's not too big of a deal but it would be nice if they would at least be 9V when fully charged.

not last long