HULKMAN Sigma 5 Amp Automatic Car Battery Charger and Maintainer

Hulkman works great, so I bought a total of 4 Hulkmans to place on all our powered equipment. Use them on our cars, motorcycles with lithium batteries, and gas golf cart. Maintains all of them with no issues and it knows when I attach them to a lithium battery, automatically. Great product!

I have two battery charger / maintainers. The old Battery Minder just didn't seem to work anymore It was time to replace it.The expensive Optima charger charges OK but didn't seem to do much to fix or maintain a battery.
My Lexus RX350 needs a new battery about every three years. I've nursed the current one for 4 years. It has been self discharging in a week or 10 days to about 50% charge. After two repair cycles with the Sigma 6 it is holding at 75% after two weeks. Sometimes new technology really does make a big difference. The Sigma 6 lives up to the advertised performance.

A lot of Cadillac 2000 Escalade having problems with it now for 2 years trying to get the battery to hold a charge gone through several batteries several chargers what was the best was the amazement I have in your products both the charger maintainer and the jump starter since I've had these I've had limit on problems your brand has definitely got my attention everything about it I'm 63 years old and the only thing that confused me is how you could put so much power in a small parcel but definitely a positive for the jumper and the charger one thing just to add I appreciate the opportunity to purchase from your site I don't like buying through the middleman can't wait to see what other products you come up with and what's available I am completely impressed I don't have the words to say how impressed I am with hulk man keep it up and thank you so much

I didn’t know that I was going to be charged a foreign transaction fee?

The is a premium tool that does what it advertises!!! Also bought the battery booster! Good stuff!!!

I am a Ford Master technician. I Purchased the HULKMAN Sigma 5 to mainly maintain the batteries while programming or updating the customer vehicles modules. A few days ago, the AGM battery on one of my personal vehicles died & did not start with a jumpstarter. I used the Sigma 5 to repair the battery, and it worked like a charm. Very handy, Reliable, and well worth the money.

HULKMAN Sigma 5 Amp Automatic Car Battery Charger and Maintainer

Fits in my tool box nicely