HIFAY ES4 Electric Sprayer 1 Gallon Built-in 4000mAh Recharg

The Verdict

The HIFAY ES4 isn’t trying to be the cheapest sprayer on Amazon, and it isn’t. What it’s trying to be is the last sprayer you buy for a while — the one that actually holds a charge, sprays consistently, and doesn’t make your forearm feel like it went through a workout. After 200 ratings averaging 4.0 stars, the consensus is clear: this is a solid mid-tier electric sprayer with a few quirks you should know about before you click buy.

What’s in the box

You get the 1-gallon polyethylene tank with a translucent body (marked in 250ml increments), the pump head assembly with a built-in 4000mAh lithium battery, a 24-inch copper wand with an adjustable brass nozzle, a shoulder strap, and a USB-C charging cable. No separate battery pack, no wall charger — just the USB-C cable, which is convenient since you likely already own several. The tank measures roughly 12 inches tall and 8 inches across, and the whole unit weighs about 4.5 pounds empty. Filled to capacity, you’re looking at around 12.5 pounds — manageable but not featherweight.

Performance and build quality

This is where the ES4 earns its keep. The 4000mAh battery is the headline spec, and in real-world testing it delivers. Users report getting through 4 to 5 hours of intermittent spraying — think treating a lawn, hitting the garden beds, then spot-treating weeds over a weekend without recharging. One reviewer put it plainly: “I sprayed my entire 1/4 acre lot with weed killer and still had battery left. My old pump sprayer would’ve had my arm dead by then.”

The adjustable brass nozzle is the other standout. Twist it one direction for a fine mist that won’t blast delicate new growth, twist it the other for a solid stream that reaches 15-20 feet — genuinely useful for tall shrubs or fence lines. The pump delivers a consistent 45 PSI, which means no sputtering or uneven coverage as the tank drains. That consistency matters more than most shoppers realize; cheap electric sprayers lose pressure as they empty, leaving you with weak, patchy application at the end of each tank.

The copper wand is a nice touch — it won’t corrode or react with most chemicals the way aluminum can. The tank itself is made from chemical-resistant polyethylene, so it handles common herbicides, fertilizers, and insecticides without degrading.

Where it falls short

Let’s be honest about the downsides. The plastic connector where the wand meets the pump head is the weak point. It’s functional, but several reviewers noted cracks after a few months of use, especially if they over-tightened the connection. Treat it gently and you’ll likely be fine, but it’s not the bulletproof metal-to-metal connection you’d find on commercial-grade units.

There’s also no battery indicator light. You’ll get a sense of when it’s dying because the spray pressure gradually drops, but that’s a poor substitute for knowing you have 20 minutes left versus 2 hours. Plan your bigger jobs for when you know the battery is fresh.

The balance issue is real too. With a full tank, the weight sits high, and while the shoulder strap helps distribute it, the sprayer still wants to tip forward if you set it down on uneven ground. It won’t dump over — the base is wide enough — but it’s something to be aware of.

Who should buy this

If you’re maintaining a suburban yard, treating a vegetable garden, or handling regular pest control around the house, the ES4 is a strong fit. It’s ideal for anyone who’s tired of hand-pumping every few minutes or who has arthritis or hand strength issues that make manual sprayers painful. It’s also great for anyone spraying larger volumes who wants to avoid the heavy, expensive backpack-style units.

Skip it if you’re a professional landscaper spraying all day, every day — you’ll want commercial-grade construction and a replaceable battery. Skip it too if you only spray once a season; a $20 manual sprayer will do the job without the upfront cost.

FAQ

How do I charge the HIFAY ES4? It uses USB-C. Plug it into any standard USB wall adapter (not included) or a power bank. Full charge takes about 3-4 hours.

Can I use bleach or acidic chemicals? The tank and wand handle standard garden chemicals fine, but avoid concentrated bleach, acid-based cleaners, or anything with strong solvents. Stick to water-based herbicides, fertilizers, and pesticides.

How long does the battery last on a single charge? Expect 4-5 hours of intermittent use. Continuous spraying drains it faster — closer to 2.5-3 hours — but the trigger lock helps you control output.

The Verdict

Buy it if: You want dependable, consistent spraying without hand fatigue and don’t mind a minor balance quirk. The battery life and nozzle versatility make it a genuine upgrade over manual sprayers.

Skip it if: You need commercial durability, want a battery indicator, or only spray occasionally and can’t justify the price over a basic pump sprayer.

At 4.2 out of 5, the HIFAY ES4 delivers on its core promise: reliable electric spraying for the home gardener who’s done with manual pumping. Just treat the wand connector kindly and keep a power bank handy.

Rating: 4.2/5

Where to Buy

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.