UniEnergy Technologies Battery » How To Know When Brass Knuckles Battery Is Charged? (Fixed!!!)

How To Know When Brass Knuckles Battery Is Charged? (Fixed!!!)

The brass knuckles battery has a 900mAh capacity and offers variable voltage with a preheat mode. Like your normal vape pen battery, it comes with a single button for its different operation settings.

Imagine a scenario where you are all tired from a tedious day and come back home to have a drag from your favorite vape pen, but unfortunately, it doesn’t work. What could be the problem? You’re pretty certain you plugged it in the day before, so there’s no chance of the battery being dead, but what if we tell you that it’s possible that you indeed plugged it in but it wasn’t charging?

Surprising, right?

Every device has its issues, and to be able to enjoy your brass knuckles pen, you need to know how to detect even the slightest problems so it doesn’t ruin your day.

Ideally, your battery is supposed to be charged if you plugged it in the previous day, but there are a couple of reasons why your battery may not be working, and we’d talk about that later on.

Charging your battery is important; who would want to carry a dead brass knuckles vape pen around?

Is Your Brass Knuckles Battery Charging?

Before you start charging your brass knuckles battery, you need to be certain it’s activated, if not, it won’t charge.

You might need to give the button 3-clicks or 5-clicks to get it activated; the essence of this is so you don’t accidentally turn it on.

Is Your Brass Knuckles Battery Charging?
Image Credit: usedvape

It’s simple to know when your battery is fully charged. Brass knuckles come with a 510 USB charger that you connect to the top of the battery, plus, its 510 connection makes it compatible with other USB vape cartridges. When the LED light blinks to green light, the charging process is complete.

When you plug it in, and it doesn’t flash a light three times, then there’s a problem with the connection, and you need to check if you got it right. If the LED light remains red after you’ve connected it to the charger, it’s charging. The knuckles battery recharges from an AC adapter and has a maximum output of 500mA.

The 900 mah capacity of this battery promises you long hours of use, and its pre-heat mode and voltage selection make it the perfect choice for cartridge vapers.

On that note, when your vape battery is not charging it could be a result of different factors.

Why Your Brass Knuckles Battery Isn’t Charging

When your battery isn’t charging it means that it has probably stopped working, and ideally you might try to clean the mouthpiece with a cotton swab and isopropyl alcohol and still find out it’s not working.

If that’s the case, then you might need to get a new battery.

Let’s look at some of the reasons why your brass knuckles battery isn’t working;

Why Your Brass Knuckles Battery Isn’t Charging
Image Credit: ocweekly

1. Dirty Connection

Normally, the cartridge passes through different voltages and this can cause it to heat up. Tiny debris or oil spillage on the connection can cause your battery to stop charging, but luckily this can be easily fixed.

Switch off the vape pen and use a cotton swap dipped in alcohol to clean the connection terminal of the battery. When the alcohol has dried out, you can put it back together, and check if your battery is charging.

The truth is, this is one of the most common reasons why your brass knuckles battery may not be charging, and that’s why it’s advised to frequently clean the battery terminals.

2. Bad Battery

If your battery is damaged, it obviously won’t charge; when it’s damaged there’s no fix to this, you need to get a new one. There are quite a number of things that could spoil your battery, including submerging it in water. Brass knuckles battery isn’t water resistant, and when in contact with water, the internal connections will be affected.

Exposing your battery to extremely hot temperatures and metal objects can cause it to malfunction as well.

3. Don’t Overcharge

There’s no need to leave your brass knuckle battery plugged in when it’s already full, after all, it can’t go past 100%. Leaving it to charge after it’s fully charged is only deteriorating its life span. It’s best to use an official compatible charger for your knuckles battery, so you don’t accidentally damage it.

Don’t Overcharge
Image Credit: fastweed

How To Prolong the Lifespan of Your Brass Knuckles Battery

  • Don’t use the wrong charger for your brass battery because it’ll gradually damage it
  • When using your brass knuckles battery, turn on the preheat mode. This is one of the best ways to maximize the battery life
  • Exposure to water will cause serious damage and reduce the lifespan of your battery
  • Turn the battery off when you are not using it, to minimize wasted energy
  • When your battery is fully charged, disconnect the batteries
  • If the safety wrappers around the batteries are worn out already, replace them with new ones

Brass Knuckles Battery Quality

The brass battery comes in both 650mAh and 900mAh capacity, for intermediate and seasoned vapers respectively. If you enjoy vaping for long hours, you need to go for the 900mAh battery, so you can enjoy your vaping experience without the battery getting dead impromptu.

Both batteries come with three voltage settings that you can conveniently choose from – 2.4v, 3.2v, and 4.0v. To adjust the voltage, click the button three times, and you’ll see a light indicator for each voltage. To turn on the preheat function, press the button twice.

Using the battery at its highest voltage isn’t the best, so you don’t end up ruining the carts.


The brass knuckles battery supplies the right amount of power to your concentrated oil cartridges with the standard 510-thread. It’s convenient and also available in two different models – 650mAh and 900mAh. It has a stylish look, plus it’s available in different colors to complement your fly – stainless, wood, and gold finish(brass).

To enjoy your brass knuckles battery, you need to be intentional about how you maintain it. never use damaged batteries, and if you notice your battery is permanently damaged, discard it properly.

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