Flex 24V Reciprocating Saw Review: Smooth Cutting With a Battery Caveat

Introduction

After roughly a year of ownership, the Flex 24V reciprocating saw has earned a place in the keep pile. It is compact for its class and delivers the lowest vibration of any reciprocating saw tested to date, and Flex’s own vibration claims held up under side-by-side comparison. The catch sits elsewhere: the 24V batteries that power it have shown an unusual failure pattern, even with light use.

This review covers what the saw does well, what to know about the 2.5Ah batteries before buying in, and how Flex handled the warranty process.

Who This Saw Is For

This is a light-to-medium duty saw, not a heavy-duty demolition tool. It suits occasional users, weekend projects, and household tasks like cutting metal stock a few times a month. It is compact enough to store in an office or garage without taking up much space, and it is clearly aimed at people who value comfort and control over raw cutting endurance.

If your work involves all-day cutting on a jobsite, this probably is not the saw you reach for first. But for intermittent cutting jobs, the low-vibration design makes a real difference.

Main Strengths

The headline feature is vibration control. Among reciprocating saws tested the same way Flex measures its own, this model posted the lowest vibration levels recorded so far, and Flex was not overstating the claim. Lower vibration means better control, less hand fatigue, and longer working sessions.

Noise is also noticeably reduced compared with typical saws in this class, which matters when cutting metal indoors or in shared spaces. Combined with its compact size, the saw is genuinely pleasant to use for metal cutting tasks.

Both strengths show up most clearly in metal cutting, which is where this saw gets most of its use here, roughly one to three times a month.

Things to Consider Before Buying

The 2.5Ah batteries are the weak point of this setup. Within the first year, both batteries developed the same fault independently, within weeks of each other. Each battery drops a charge bar every day or two while sitting, delivers only around five minutes of runtime instead of the original fifteen to twenty, and charges back to full in under a minute because capacity has genuinely collapsed. Runtime dropped by roughly 40 to 60 percent despite similar bar readings.

Both units carry the same build date, have serial numbers close together off the assembly line, and saw under 30 charge cycles with clean storage conditions indoors. This does not appear to be a storage or abuse problem, and it suggests either a bad production batch or an issue with how these cells handle sitting idle. There is a suspicion these batteries do not tolerate sitting unused for long stretches.

Buyers should also note that replacement coverage has practical limits. The tools carry a lifetime warranty from the founders’ program, but battery replacements are limited to a small number of swaps, and one has already been used in the first year of ownership.

Buying Advice

The one clear bright spot in the battery saga is Flex’s support. A call to the regular service line connected to a representative in under thirty seconds, with no troubleshooting demands and no pushback. Both replacements were confirmed and shipped within minutes, and a shipping confirmation email arrived shortly after the call. The whole interaction took under six minutes and ranks among the easiest warranty experiences with any brand.

Practically speaking, the saw itself is easy to recommend for light and medium cutting duty, especially if vibration and noise matter to you. Just plan on either buying larger-capacity batteries for runtime, keeping the batteries in regular rotation rather than letting them sit, and knowing that if they do fail, Flex’s service process will likely take care of you without friction.

Conclusion

The Flex 24V reciprocating saw is a genuinely good tool: compact, quiet, and the best on vibration that has been measured. The 2.5Ah batteries are the reason for hesitation, with both failing early under light use. With responsive warranty support behind it, the saw remains a solid pick, just go in with eyes open about the batteries.