---
product_id: 153205942
title: "9V Rechargeable Battery,850mAh High Capacity Li-ion 9V Batteries 4 Pack PP3 6F22 9V E-block Lithium Batteries for Smoke Detector Alarm,Fire Alarm,Multi-meter,Radio Microphone,Kids Toys(Battery Only)"
brand: "kratax"
price: "304 zł"
currency: PLN
in_stock: true
reviews_count: 3
url: https://www.desertcart.pl/products/153205942-9v-rechargeable-battery-850mah-high-capacity-li-ion-9v-batteries
store_origin: PL
region: Poland
---

# 4H fast charge 850mAh capacity 500 recharge cycles 9V Rechargeable Battery,850mAh High Capacity Li-ion 9V Batteries 4 Pack PP3 6F22 9V E-block Lithium Batteries for Smoke Detector Alarm,Fire Alarm,Multi-meter,Radio Microphone,Kids Toys(Battery Only)

**Brand:** kratax
**Price:** 304 zł
**Availability:** ✅ In Stock

## Summary

> 🔋 Power that Lasts: Never Run Out of Juice Again!

## Quick Answers

- **What is this?** 9V Rechargeable Battery,850mAh High Capacity Li-ion 9V Batteries 4 Pack PP3 6F22 9V E-block Lithium Batteries for Smoke Detector Alarm,Fire Alarm,Multi-meter,Radio Microphone,Kids Toys(Battery Only) by kratax
- **How much does it cost?** 304 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/153205942-9v-rechargeable-battery-850mah-high-capacity-li-ion-9v-batteries)

## Best For

- kratax enthusiasts

## Why This Product

- Trusted kratax brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safety First:** CE/RoHS certified with multi-protection features.
- • **Eco-Friendly Energy:** Non-toxic, memory-free, and sustainable.
- • **Power Up Your Devices:** Experience longer use time with 850mAh capacity.
- • **Versatile Compatibility:** Perfect for smoke detectors, toys, and more.
- • **Quick Charge Convenience:** Fully charge in just 4 hours, no need to pair.

## Overview

The Kratax 9V Rechargeable Battery pack includes four high-capacity 850mAh lithium-ion batteries designed for a variety of devices, offering safety features, quick charging, and eco-friendly performance with up to 500 recharge cycles.

## Description

Full description not available

## Features

- ❤850mAh 9V Rechargeable Battery: This 9 volt rechargeable lithium-ion battery pack is Kratax new 9V batteries set,this PP3 9v battery provides longer use time per charge, with larger capacity and ultra long lasting. Last 3 times longer than traditional rechargerable 6f22 23f6-220 9v batteries disposable 6lr61 alkaline battery.
- ❤Multi-Protection 9v 6f22 battery: These 9volt fire alarm batteries get CE/RoHS Certified. And designed with built-in IC Protection:over-charge,over-discharge,short-circuit,reverse polarity,over-voltage,over-current and over-heated,to make sure the safety for over-night charging
- ❤Applicable equipment: Our 9v e-Block Battery Suitable for Transistor Radio, Walkie-talkie, Remote Control Toys, Smoke Alarm, Smoke Detectors, Guitar, Wireless Microphone, Multimeter, Cameras, Alarm Clocks, Portable Radios and other electronic and medical equipment.Kratax 9V Li-ion battery is ensure good performance in any extreme weather or temperature from -20°C - 60°C / -4°F - 140°F.non-toxic, without memory effect and environmentally friendly.
- ❤4H Fast Charge:Our 9v smoke detector batteries can be charged separately,without the need to charge in pairs.Using Kratax 9V battery charger (input:5V/2A;output:8.7v/260mA*4),those 9 volt lithium ion batteries can fully charge 4 batteries in about 4 hours. The actual voltage of full charge is 8.4V-8.7V,not 9V(charger not included)
- ❤500 Rechargeable Cycles:Kratax 9V Li-ion battery is non-toxic, without memory effect and environmentally friendly, and charge cycles can be up to at least 500.And the self-discharge of this litium 9v battery is about 0.03% per month,less than 1% self-discharge of Ni-MH batteriy

## Product Details

- **Number of batteries:** 4 Lithium Ion batteries required. (included)
- **Brand:** Kratax
- **Battery cell composition:** Lithium Ion
- **Battery capacity:** 850 Milliamp Hours
- **Recommended uses for product:** Smoke Alarms, smoke detector, massager, electric guitar, Metal detector, Multi-meter, Digital toys and games, transistor radios & controlled toys, tools, torches, 9V battery flashlight, digital devices including radios, clocks, etc.

## Images

![9V Rechargeable Battery,850mAh High Capacity Li-ion 9V Batteries 4 Pack PP3 6F22 9V E-block Lithium Batteries for Smoke Detector Alarm,Fire Alarm,Multi-meter,Radio Microphone,Kids Toys(Battery Only) - Image 1](https://m.media-amazon.com/images/I/61mBT-LbicL.jpg)
![9V Rechargeable Battery,850mAh High Capacity Li-ion 9V Batteries 4 Pack PP3 6F22 9V E-block Lithium Batteries for Smoke Detector Alarm,Fire Alarm,Multi-meter,Radio Microphone,Kids Toys(Battery Only) - Image 2](https://m.media-amazon.com/images/I/713GrgA8sFL.jpg)
![9V Rechargeable Battery,850mAh High Capacity Li-ion 9V Batteries 4 Pack PP3 6F22 9V E-block Lithium Batteries for Smoke Detector Alarm,Fire Alarm,Multi-meter,Radio Microphone,Kids Toys(Battery Only) - Image 3](https://m.media-amazon.com/images/I/711jtQS71PL.jpg)
![9V Rechargeable Battery,850mAh High Capacity Li-ion 9V Batteries 4 Pack PP3 6F22 9V E-block Lithium Batteries for Smoke Detector Alarm,Fire Alarm,Multi-meter,Radio Microphone,Kids Toys(Battery Only) - Image 4](https://m.media-amazon.com/images/I/71b3lspuq+L.jpg)
![9V Rechargeable Battery,850mAh High Capacity Li-ion 9V Batteries 4 Pack PP3 6F22 9V E-block Lithium Batteries for Smoke Detector Alarm,Fire Alarm,Multi-meter,Radio Microphone,Kids Toys(Battery Only) - Image 5](https://m.media-amazon.com/images/I/71vNIhKENhL.jpg)

## Available Options

This product comes in different **Size Name** options.

## Questions & Answers

**Q: Got 4 batteries pluged in charger, all 4 led are flashing both green and red, where when pluged just 3 batteries there is 3 solid red lights.That ok?**
A: This means that your USB port is not supplying enough amps for the number of batteries charging.  This will happen with say an older usb power adaptor.  Try (i) charging less batteries at one time (ii) getting a new power adaptor that is rated for usb c or (iii) just plugging it into something that can supply enough power such as a PC.

**Q: Will they discharge if left connected to the unplugged charger? When not in use, would be handy if I can leave connected to protect the terminals.**
A: No definitive answer on this in my experience if kept on the charger and briefly plugged back in prior to use they may show charging briefly (5_10 mins max) but this may be due to lithium batteries normal nominal loss while stored (much less than nic cads) rather than any effect of the storage being in the charger.

**Q: Are these batteries the same measurements as everyday standard 9 volt batteries. Please.**
A: I only use these type of 9volt batteries so I couldn't say if they were the same measurements as alkaline ones. They last well until needing recharged

**Q: can you charge these on a standard multi battery mains charger**
A: Yes, assuming there are the appropriate "press-stud" contacts on your multi-charger. This is exactly what I have.

Additionally, the batteries arrived with a coupon to claim a free charger, specifically for the 9 volt batteries.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quality and lots of power
*by E***D on 16 May 2020*

I was looking for some 9v lithium rechargeable for smoke-alarms, water leakage alarm, gadgets, etc. I have already some in use, but as the number of gadgets using PP3 increased, I didn't want to use single-use alkaline or lithiums. As a matter of fact, I had bought some 9v "industrial grade" alkaline of a well-known brand but was disappointed by the performance. I was about to order more of a brand I had been using till I came across these Kratax at 850mAH. Naturally, at 850mAH, they are a bit more expensive. Was it worth paying the extra? I decided to take the plunge because I am an Eneloop battery user, and believe me, you pay a premium for quality., but it's worth it in the long run. The Kratax batteries arrived in a study box (I opted for 4 pieces). I immediately put them on to charge. I wanted to see how well they could keep the charge and if the voltage would be up to a level acceptable to run most 9v gadgets. As you may know, most rechargeable PP3 are rated at most 8.2-8.5v, and because of this, are not recommended for alarms. I was glad to see that these charged to over 8.6v which was better than the 8.3 I got from my old PP3s of a different brand. After over a week on the shelf, I checked and was pleased to find that the voltage remained at over 8.6v+ and had hardly dropped. I'm sure with a few more charging cycles, the voltage will creep even nearer the 9v mark. There are admittedly early days, but the signs are very good. They have gone into some gadgets and not a beep from under-voltage. Like my Eneloops, these are worth the little extra.

### ⭐⭐⭐⭐⭐ Long life (850mAh) weighing 30g each. Neat unit.
*by S***E on 19 September 2020*

Charger and batteries arrived today.Very tidy and neat box. I know that sounds sad, but I like a product to be well packaged. Shows some care and thought has gone into it. Down side is they are still using a plastic tray to hold the contents.The unit itself is neat as well, big enough to do the job and yet small enough to easily fit in your pocket if you wished to.It comes with a short charging cable with a modern USB type-c end, so doesn't matter which way up it is plugged in.Small (but efficient) LEDs clearly show red for charging, or green for fully charged/empty slot.I was after some powerful, yet light 9v batteries for a Robotics project I'm working on, and hopefully with the 850mAh rating they will be a good choice. There are higher powered 9v batteries about, with some over 1000mAh, but some them are unbranded which is always a worry. If you are proud of your product, then you are happy to have your name on them.In this case, the charger and the batteries are branded. :-)The batteries weigh in at 30g each. That's about 5g lighter than the standard non rechargeable batteries I compared.Input for the charger is rated at 2.3A. Not sure if that is for all 4 batteries charging at once. This is fine with the more powerful charging circuits built for the iPhones etc, but I doubt if a pc or laptop would deliver that current. It might not work with them, or might just take longer to charge.The clear (although small printed) instructions say about 4hrs to charge. Not sure how much charge was in them on delivery, so will test that once I drain the first one.The charger allows 1,2,3 or 4 batteries to be charged at any one time.30 day moneyback and 1 year quality gaurantee from manufacturer. Alegidly each battery can be charged up to 500 times.I look forward to happy roboting with these batteries.

### ⭐⭐⭐⭐⭐ A great replacement for non-rechargeables
*by C***S on 23 August 2021*

I was initially looking for non-rechargeable 9v PP3 lithium batteries for use in multi-meters and other portable test equipment. I have in the past had devices damaged (sometimes beyond repair) by leaking alkaline and zinc batteries. I have tried NiMh re-chargeable batteries, which give me the leakage peace of mind, but often let me down due to their relatively low capacity, and considerable self discharge (the AA & AAA varieties) are much better in this respect).On discovering these Kratax re-chargeable lithium batteries, I figured that they would give me the leak protection that I desired, and because of the much greater capacity, and lower self-discharge properties than NiMh batteries, they should prove more reliable in practice.I ordered the set with the charger, as my charger is a smart charger designed specifically for NiCd and NiMh batteries.The item arrived within two days of ordering and was well packaged. Both batteries and charger have a quality feel to them.Charging took about an hour, and after allowing them to settle for several hours the four batteries all measured 8.51v and measured equally under load, so consistency appears to be good. Having had them for less than a week, I cannot comment on their long-term performance.I am very pleased with my purchase and would definitely recommend these batteries and charger.

## Frequently Bought Together

- 9V Rechargeable Battery,850mAh High Capacity Li-ion 9V Batteries 4 Pack PP3 6F22 9V E-block Lithium Batteries for Smoke Detector Alarm,Fire Alarm,Multi-meter,Radio Microphone,Kids Toys(Battery Only)
- Kratax 8-Pack AA Rechargeable Batteries with LCD Charger, 3500 mWh High Capacity 1.5V Lithium AA Battery, Max 3A Current,1600 Long Cycles - Home&Office Use|Blink Camera|VR/Xbox GamingPad|RC Car,etc.
- Kratax 1.5 V Lithium AAA Battery, Rechargeable AAA Lithium Battery, 1100 mWh (1.5 V/733 mAh) High Capacity, Constant Performance, Long Service Life, 12 Pieces AAA Battery with LCD Display Charger

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-01-26*