







🔋 Power Up & Stay Ahead: The Ultimate 12V Battery Lifesaver
The CTEK CT5 is a compact, 12V automotive battery charger designed for motorcycles, ATVs, snowmobiles, and more. It supports both lead-acid and lithium-ion (LiFePO4) batteries, featuring smart charging modes including a reconditioning function to revive deeply discharged batteries. Lightweight and portable, it ensures optimal battery maintenance and direct alternator power supply for reliable performance.






| Manufacturer | CTEK |
| Brand | CTEK |
| Model | CTEK, Inc. 40-339 |
| Item Weight | 1.79 pounds |
| Product Dimensions | 7 x 2.5 x 1.5 inches |
| Item model number | 40-339 |
| Exterior | Painted |
| Manufacturer Part Number | 40-339 |
J**E
High quality. Multiple charges connection to any batteries.
I has a fun car I don’t drive all the time. This keeps it charged. I also have another car that waits a battery that was going bad. I had to wait to get it changed , but left this charger on it over night so it would start every morning. The multiple charger connection are very helpful.
D**N
A must have for storing your car when not in use
A great device to keep your stored car’s battery charged all winter,
B**S
Great charger!
High quality charger !! The best !
D**S
Quality charger
I use these CTEK chargers on all my atvs. They work great and help prolong battery life.
R**R
2.3 amps is all you will get
I like these chargers, they are good but this one only puts out 2.3 amps max. You need on a car, the 4.3 amp version. Smaller batteries like a motorcycle or other small battery you can use these but, why wouldn't you get the 2 amp more charger that you can do everything with? Same price, more power, just the same electronics which is good and the charger will do more.I like these chargers they do work well, are safe and keep the batteries fully charged without overcharging them and killing them. They are fully electronic and limit charge cycles and rate. I have installed a few for friends and myself and I love them and have confidence in them. Use them all the time in a car that sits for awhile before being used and it works like a charm. The potential for extending battery life and keep working in top notch is what these are supposed to do and they do work. I have not seen one battery fried by these that I have seen on other chargers either.
T**E
Just an fyi for this GREAT product.
I really like this charger and it seems to work great. However I have one issue with this Kit. It should also include the more standard adapter that is pre-installed on many bikes. The kit does come with it's own pigtail quick connect to be installed which I'll admit is a nicer connection system and I'll use on one of my bikes that doesn't already have the common connecter installed. Just incase anyone is interested, here is the part you'll also need to purchase if you already have the more common pigtail that have a puch together connector that has one post covered and one post bare...CTEK (56-564) Comfort Indicator Pigtail
S**.
Works As It Should, Very Reliable, Does Not Overcharge
I have 4 of these now and have had great luck with them over the past few years on Powersports and Automotive applications, highly recommended.
J**N
Great little charger
This is my second CTEK. I have the quick connect on all my batteries and move it around. I always wanted a second one to make this process easier, but now I can't find the first one. Now I have two and know where one is. It'll be a good day when old reliable #1 shows up again.
Trustpilot
2 weeks ago
1 month ago