The strongest energy drinks
These are the 20 highest-caffeine cans in our database, sorted by milligrams, with each one's Shark Score so you can find the strong ones that also taste good. Know your limit: the FDA cites 400 mg a day for healthy adults.
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| # | Drink | Caffeine | Score |
|---|---|---|---|
| 1 |  Wired X344Wired |
344 mg | 55 |
| 2 |  Wired X344 Berry RushWired |
344 mg | 40 |
| 3 |  Adrenaline Shoc Acai BerryAdrenaline Shoc |
300 mg | 93 |
| 4 |  Reign Inferno Red DragonReign |
300 mg | 90 |
| 5 |  Rockstar XDurance Super Sour Green AppleRockstar |
300 mg | 89 |
| 6 |  Adrenaline Shoc Shoc WaveAdrenaline Shoc |
300 mg | 88 |
| 7 |  Adrenaline Shoc WatermelonAdrenaline Shoc |
300 mg | 88 |
| 8 |  Bang Nectarine BlueberryBANG |
300 mg | 88 |
| 9 |  Raze Strawberry ColadaRaze |
300 mg | 88 |
| 10 |  Reign Inferno Watermelon WarlordReign |
300 mg | 87 |
High-caffeine drinks aren't recommended for children, pregnant people, or anyone sensitive to caffeine.
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WiredShark Score 55
1. Wired X344
- 344 mg caffeine
- 16 oz can
- 21.5 mg/oz
- Okay
“Crazy energy, poor taste. It was cheap, effective, and definitely not worth having again.”Cam
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WiredShark Score 40
2. Wired X344 Berry Rush
- 344 mg caffeine
- 16 oz can
- 21.5 mg/oz
- Mediocre
“Insane kick, but bitter, artificial, and rather unenjoyable flavor.”Cam
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Adrenaline ShocShark Score 93
3. Adrenaline Shoc Acai Berry
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Elite
“It’s somehow sweet, bitter, and has high carbonation while still being insanely smooth.”Jared
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Shark Score 90
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Elite
“Smooth fruit punch flavor with melon aftertaste that walks the fine line of re-drinkability by not being too sweet.”Jared
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Shark Score 89
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Excellent
“Strong and sour green apple energy drink. Superior to most sour beverages. Highly rated kick and taste make it my highest rated Rockstar.”Cam
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Adrenaline ShocShark Score 88
6. Adrenaline Shoc Shoc Wave
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Excellent
“With its inoffensive flavor, it’s easily re-drinkable, and I’d recommend it if you’re looking for a big kick.”Jared
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Adrenaline ShocShark Score 88
7. Adrenaline Shoc Watermelon
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Excellent
“The best watermelon flavor out there. Highly recommended to everyone. Strong kick, delicious flavor, and overall incredible energy drink.”Cam
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Shark Score 88
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Excellent
“A sweet and crisp nectarine flavor, complemented by a subtle, delicious blueberry aftertaste.”Cam
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Shark Score 88
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Excellent
“A unique strawberry taste, great mouth feel, and high caffeine content that will leave you wanting more.”Cam
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Shark Score 87
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Excellent
“Incredible kick and appearance with an enjoyable flavor. Directly inferior taste to Adrenaline Shoc Watermelon, but still a very solid all-around energy drink.”Cam
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BANGShark Score 86
11. BANG Purple Haze
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Excellent
“The best Bang. Superior grape Fanta flavor. Incredible kick. No real downsides.”Cam
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Shark Score 86
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Excellent
“If you want an awesome Bang kick with a surprisingly chill cherry lemonade flavor, this is the drink for you.”Jared
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ReignShark Score 85
13. Reign Lilikoi Lychee
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Excellent
“Lilikoi Lynchee is such a unique drink, it’s like one of the Bang energy flavors put a tux on”Matt
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Shark Score 84
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Excellent
“Unique mixed berry flavor with a strong blackberry aftertaste. Strong kick. Flavor will tire quickly, but is on occasion quite enjoyable.”Cam
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Shark Score 84
- 300 mg caffeine
- 20 oz can
- 15 mg/oz
- Zero sugar
- Excellent
“Strong limeade, subtle cherry.”Jared
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Shark Score 84
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Excellent
“Unique clear and yellow gummy bear flavor that is reminiscent of sprite. Very enjoyable, but just a tad too sweet.”Cam
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BANGShark Score 82
17. BANG Pina Colada
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Excellent
“Do you like consuming lots of caffeine? Do you like pina coladas? If yes and yes, Bang Pina Colada is a 10/10.”Jared
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CelsiusShark Score 81
18. CELSIUS HEAT Inferno Punch
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Excellent
“Superior to most punch flavored energy drinks. With a solid kick, flavor, and appearance, there is not much to dislike about Celsius Heat Inferno Punch.”Cam
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ReignShark Score 81
19. Reign Cherry Limeade
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Excellent
“Smooth, well-balanced 300mg energy drink. Cherry is candy-sweet with muted limeade flavor.”Jared
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ReignShark Score 81
20. Reign Melon Mania
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Excellent
“Most boring “Excellent” energy drink out there. It has everything it needs to be great, but it is missing some properties that would make it elite.”Cam
Questions
What is the strongest energy drink?
Of the drinks we've rated, Wired X344 has the most caffeine: 344 mg per 16 fl oz can.
Is 300 mg of caffeine too much?
For healthy adults, the FDA cites 400 mg a day as generally safe, so one 300 mg can leaves room for about one cup of coffee. Start lower if you're sensitive to caffeine, and skip these if you're pregnant or under 18.