A Craftsman battery is only as good as the platform of packs it competes against, and most shoppers weighing a Craftsman purchase are really asking a broader question: does paying more for a "high output" version of any brand's battery actually get you more runtime, and does an unbranded knockoff pack put out the same power as the real thing? No dedicated Craftsman battery shootout exists in the testing corpus behind this guide, but a real, measured comparison of 10 packs from Ryobi, Milwaukee, Kobalt, and Ridgid answers exactly that question, and it applies to any brand's battery lineup, Craftsman included.
What the testing showed
The numbers below come from Project Farm's power tool battery comparison, which tested 10 battery packs. Craftsman was not part of this specific lineup, and the guide is upfront about that, but the packs tested cover the exact same buying decision Craftsman shoppers face: regular versus premium high-output versions of the same platform, and genuine versus knockoff cells.
The lineup paired a standard pack against a premium "high output" pack for three brands, plus a genuine-versus-counterfeit comparison for a fourth:
- Ryobi One+: regular 4Ah pack versus the High Performance 4Ah pack, priced 35 dollars higher.
- Milwaukee M18: the XC 3.0 regular pack at 100 dollars versus the Red Lithium High Output CP 3.0 at 119 dollars.
- Kobalt: the Extended Run 4Ah pack at 60 dollars versus the Ultimate Output 24V pack at 70 dollars.
- Ridgid: the standard 4Ah pack at 99 dollars versus the Max Output 4Ah pack at 110 dollars.
- Milwaukee genuine versus knockoff: an unbranded knockoff 9Ah pack at 44 dollars versus the genuine Milwaukee XC8.0 8Ah pack at 229 dollars.
The high-output premium delivered real, weighable differences
The Milwaukee Red Lithium High Output CP 3.0 weighed 592 grams, a full 121 grams lighter than the regular XC 3.0's 713 grams, despite costing 19 dollars more, a genuine physical difference in cell construction rather than just marketing language on the label. Ryobi's High Performance pack, by contrast, weighed slightly more than the regular version, 728 grams versus 703 grams, and claimed 74 watt-hours along with a 30 percent power increase and cooler running, showing that "high output" does not mean the same engineering choice across every brand.
Kobalt's Ultimate Output pack actually weighed less than its own regular Extended Run pack, 724 grams versus 789 grams, while the Ridgid Max Output pack weighed essentially the same as its regular counterpart, just 4 grams more, a reminder that a premium label does not guarantee a physically different battery underneath.
The genuine-versus-knockoff test showed a real, measured gap
The genuine Milwaukee XC8.0, at 229 dollars, clearly outperformed the 44 dollar unbranded knockoff pack on both stages of a blower-speed endurance test. In the warm test, the genuine pack started off stronger and lasted over 4 minutes longer, running for 16 minutes 5 seconds at a battery temperature of 93.5F. In the cold test, the genuine pack again started stronger and outperformed the knockoff for the entire run, lasting roughly 3.5 minutes longer. The knockoff pack's cells were noted as Korea-processed with further processing in China, though the transcript flags some uncertainty in that exact attribution.
How to read this for your own purchase
Since Craftsman's specific packs were not part of this test, apply the buying pattern this data makes clear across four different brands to whatever platform you actually own, Craftsman included.
A "high output" or premium pack is not a uniform upgrade across brands. Milwaukee's premium pack got lighter, Ryobi's got slightly heavier, and Kobalt's premium pack got lighter than its own regular version. Check what the premium version actually claims to improve (runtime, weight, cooler operation, or peak output) rather than assuming "high output" means the same thing on every platform.
Genuine packs earned their price premium in this test. The gap between the genuine Milwaukee pack and the unbranded knockoff was not subtle, over 4 minutes of extra runtime in one stage of testing. If your tools represent a real investment, an unbranded battery pack is a real risk to that investment, not just a minor gamble.
A few universal rules the data supports for any tool battery purchase, including Craftsman's platform:
- Weight differences between a regular and premium pack are a real, checkable signal, not just marketing. If a premium pack from your platform is not lighter, cooler-running, or measurably longer-lasting in independent testing, question whether the premium price is buying anything real.
- Country of manufacture varied even within a single brand's own lineup in this test (Mexico versus China for two Milwaukee packs), so don't assume uniform sourcing within a brand family.
- A steep discount on an unbranded pack usually reflects a real performance gap, as the roughly 5x price difference between the genuine and knockoff Milwaukee packs in this test demonstrated in actual runtime.
Browse the rest of the power tool batteries hub for more packs measured on real runtime and capacity.