CTEK (56-959) Silver Mus 4.3 Test & Charge 12 Volt Fully Automatic Charger and Tester
The CTEK MUS 4.3 Test & Charge is your ultimate tool for battery care and diagnostics. Combining advanced battery charging with comprehensive testing capabilities, it ensures your battery and vehicle charging system are always in optimal condition. The MUS 4.3 Test and Charge features a unique, patented system to recover, charge, and maintain all types of lead-acid batteries. This ensures peak performance and extends the life of your batteries. Simple plug-and-play functionality, the MUS 4.3 Test & Charge takes the hassle out of battery care. Just select the desired program and mode, and the charger does the rest. Featuring a patented 8-step charging process, this advanced charger tests your battery's condition, revives deeply discharged batteries, charges efficiently, and provides long-term maintenance. With features like automatic desulphation, reconditioning, and diagnostic testing, the MUS 4.3 Test & Charge maximizes performance and longevity. A powerful tool that combines the benefits of advanced microprocessor-controlled charging with detailed battery and alternator diagnostics.
The CTEK MUS 4.3 Test & Charge is your ultimate tool for battery care and diagnostics. Combining advanced battery charging with comprehensive testing capabilities, it ensures your battery and vehicle charging system are always in optimal condition. The MUS 4.3 Test and Charge features a unique, patented system to recover, charge, and maintain all types of lead-acid batteries. This ensures peak performance and extends the life of your batteries. Simple plug-and-play functionality, the MUS 4.3 Test & Charge takes the hassle out of battery care. Just select the desired program and mode, and the charger does the rest. Featuring a patented 8-step charging process, this advanced charger tests your battery's condition, revives deeply discharged batteries, charges efficiently, and provides long-term maintenance. With features like automatic desulphation, reconditioning, and diagnostic testing, the MUS 4.3 Test & Charge maximizes performance and longevity. A powerful tool that combines the benefits of advanced microprocessor-controlled charging with detailed battery and alternator diagnostics.
The CTEK MUS 4.3 Test & Charge is your ultimate tool for battery care and diagnostics. Combining advanced battery charging with comprehensive testing capabilities, it ensures your battery and vehicle charging system are always in optimal condition. The MUS 4.3 Test and Charge features a unique, patented system to recover, charge, and maintain all types of lead-acid batteries. This ensures peak performance and extends the life of your batteries. Simple plug-and-play functionality, the MUS 4.3 Test & Charge takes the hassle out of battery care. Just select the desired program and mode, and the charger does the rest. Featuring a patented 8-step charging process, this advanced charger tests your battery's condition, revives deeply discharged batteries, charges efficiently, and provides long-term maintenance. With features like automatic desulphation, reconditioning, and diagnostic testing, the MUS 4.3 Test & Charge maximizes performance and longevity. A powerful tool that combines the benefits of advanced microprocessor-controlled charging with detailed battery and alternator diagnostics.
The CTEK MUS 4.3 Test & Charge is your ultimate tool for battery care and diagnostics. Combining advanced battery charging with comprehensive testing capabilities, it ensures your battery and vehicle charging system are always in optimal condition. The MUS 4.3 Test and Charge features a unique, patented system to recover, charge, and maintain all types of lead-acid batteries. This ensures peak performance and extends the life of your batteries. Simple plug-and-play functionality, the MUS 4.3 Test & Charge takes the hassle out of battery care. Just select the desired program and mode, and the charger does the rest. Featuring a patented 8-step charging process, this advanced charger tests your battery's condition, revives deeply discharged batteries, charges efficiently, and provides long-term maintenance. With features like automatic desulphation, reconditioning, and diagnostic testing, the MUS 4.3 Test & Charge maximizes performance and longevity. A powerful tool that combines the benefits of advanced microprocessor-controlled charging with detailed battery and alternator diagnostics.
in 18 offers
The lowest price for CTEK (56-959) Silver Mus 4.3 Test & Charge 12 Volt Fully Automatic Charger and Tester right now is $177.21 at ubuy.sv, compared across 17 retailers.
The all-time low was $161.35 on 26 Feb 2026 — today's price is 10% above the lowest ever. That's a little above the best price we've seen.
Prices last updated 9 June 2026.
Last updated at 09/06/2026 09:40:17
CTEK 4.3 Test & Charge, 12 Volt Fully Automatic Charger with Unique Battery and Alternator Testing, Ideal for Long Term Storage
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
CTEK 4.3 Test & Charge, 12 Volt Fully Automatic Charger with Unique Battery and Alternator
Delivery between 16–22 June $14.18
CTEK 4.3 Test & Charge, 12 Volt Fully Automatic Charger with Unique Battery and Alternator
Delivery between 13–17 June $14.11
CTEK 4.3 Test & Charge, 12 Volt Fully Automatic Charger with Unique Battery and Alternator
Delivery between 13–17 June $15.38
CTEK MUS 4.3 Test & Charge - 12 Volt 56959 56-959
Delivery between 11–20 June $418.21
CTEK 4.3 Test & Charge, 12 Volt Fully Automatic Charger with Unique Battery and Alternator Testing, Ideal for Long Term Storage
Delivery between 13–17 June $15.52
CTEK MUS 4.3 Test & Charge 12V Battery Charger
Delivery $120.50
CTEK 4.3 Test & Charge, 12 Volt Fully Automatic Charger with Unique Battery and Alternator
Delivery between 16–20 June $15.39
CTEK Power Inc Battery Charger 56-959
Free delivery
CTEK MUS 4.3 Test & Charge 12V Advanced Battery Charger & Tester
Delivery $125.92
originally posted on techbatterysolutions.com
The Test & Charge came with very good instructions and worked quickly to rescue my tired battery. The battery and alternator tests are easy and give an early warning about potential problems.
originally posted on ebay.com
a great charger i have had one hooked up to the same battery for 3 straight years ... works great
originally posted on ebay.com
It lives up to the claims / promises and even more. Very efficient in a compact package. Have bought three: one for me and one for each son.
| Product dimensions | 10.16 x 10.16 x 1.27 cm; 861.83 Grams |
| Is Discontinued By Manufacturer | No |
| Exterior | Machined |
| OEM Part Number | 56-959 |
| Voltage | 12 Volts |
CTEK 4.3 Test & Charge, 12 Volt Fully Automatic Charger with Unique Battery and Alternator Testing, Ideal for Long Term Storage
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
CTEK 4.3 Test & Charge, 12 Volt Fully Automatic Charger with Unique Battery and Alternator
Delivery between 16–22 June $14.18
CTEK 4.3 Test & Charge, 12 Volt Fully Automatic Charger with Unique Battery and Alternator
Delivery between 13–17 June $14.11
CTEK 4.3 Test & Charge, 12 Volt Fully Automatic Charger with Unique Battery and Alternator
Delivery between 13–17 June $15.38
CTEK MUS 4.3 Test & Charge - 12 Volt 56959 56-959
Delivery between 11–20 June $418.21
The Test & Charge came with very good instructions and worked quickly to rescue my tired battery. The battery and alternator tests are easy and give an early warning about potential problems.
a great charger i have had one hooked up to the same battery for 3 straight years ... works great
It lives up to the claims / promises and even more. Very efficient in a compact package. Have bought three: one for me and one for each son.
I use this for my AGM deep cycle battery and it works great. Nice to find a charger that really supports AGM. Have also used on my cars and tractor.
The first thing I noticed was the rugged construction of the CTEK trickle charger. The cord and wiring feels heavy gauge and yet not so as to be inflexible. I've used it's rejuvination mode on several batteries in equipement that had been sitting over the winter on our farm and in every case the standing voltage of the battery a day or two after disconnecting the charger is slightly higher than the average battery in our "regularly used" vehicles and equipment. I am thus far very impressed. I've even used it on our combine with 2-1000 CA batteries connected in parallel that had dropped to around 10.5 volt. I was too lazy to disconnect them and charge seerately and besides I thought it to be a good test for the charger. In about 40 hours it had the pair registering ... MoreThe first thing I noticed was the rugged construction of the CTEK trickle charger. The cord and wiring feels heavy gauge and yet not so as to be inflexible. I've used it's rejuvination mode on several batteries in equipement that had been sitting over the winter on our farm and in every case the standing voltage of the battery a day or two after disconnecting the charger is slightly higher than the average battery in our "regularly used" vehicles and equipment. I am thus far very impressed. I've even used it on our combine with 2-1000 CA batteries connected in parallel that had dropped to around 10.5 volt. I was too lazy to disconnect them and charge seerately and besides I thought it to be a good test for the charger. In about 40 hours it had the pair registering 12.75 volt and cranking a 530 cu inch cummins on a 40 degree morning like the engine had just been shut off from a day in the field.
If its too good to be true, it probably is. Luckily in this case it was not! Item appears to be of good quality, its easy to use, and I feel confident in using the product. I bought 2 of these to use as charger/maintainers on 2 batteries I keep as a back up for a medical device. I have poured hours of research into finding the right battery charger. What I found was most smart battery chargers really are not. They say they stop charging, but they dont. CTEK was the exception. Their 8 step process appears to be just what the doctor ordered. (It is worth noting that some of the more inexpensive models of CTEKs chargers do not have all 8 steps) According to CTEK, this charger can be left on the batteries for months at a time. I am going to be putting this to the test ... MoreIf its too good to be true, it probably is. Luckily in this case it was not! Item appears to be of good quality, its easy to use, and I feel confident in using the product. I bought 2 of these to use as charger/maintainers on 2 batteries I keep as a back up for a medical device. I have poured hours of research into finding the right battery charger. What I found was most smart battery chargers really are not. They say they stop charging, but they dont. CTEK was the exception. Their 8 step process appears to be just what the doctor ordered. (It is worth noting that some of the more inexpensive models of CTEKs chargers do not have all 8 steps) According to CTEK, this charger can be left on the batteries for months at a time. I am going to be putting this to the test as I plan to leave this connected to my batteries to keep them primed and ready to take over during power outages; fingers crossed!
Doesn't have the features as CTEK 5.0 but gets the job done. Lot's of value in this little bitty charger. It does things some big table top chargers can't do.
This little unit has already saved me the cost of replacing two batteries. It is well worth it's price.
This little dynamo has fixed my world of wonky batteries . It charges it tests it analyzes , it does it all . It route off one of my problem batteries. I successfully reconditioned five other neglected batteries. My world is good and I didnt spend a Kings ransom to get it, MONEY WELL SPENT ! IMHO
Perfect for maintaining the charge on my airplane. Safe, and efficient.
| Product dimensions | 10.16 x 10.16 x 1.27 cm; 861.83 Grams |
| Is Discontinued By Manufacturer | No |
| Exterior | Machined |
| OEM Part Number | 56-959 |
| Voltage | 12 Volts |
