CTEK 40-328 PRO25S Professional High Efficiency 25 Amp Battery Charger and Power Supply
CTEK 40-328 PRO25S Professional High Efficiency 25 Amp Battery Charger and Power Supply
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CTEK

CTEK 40-328 PRO25S Professional High Efficiency 25 Amp Battery Charger and Power Supply

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Key item features

  • Dedicated lithium (12V lithium batteries (LiFePO4, Li-Fe, Li-iron, LFP) mode
  • Compatible with batteries from 40 Ah to 500 Ah (30 Ah to 450 Ah lithium - 12V lithium batteries (LiFePO4, Li-Fe, Li-iron, LFP)
  • Built-in temperature sensor to achieve maximum charge levels
  • Fully automatic and easy to use. Simple to connect, spark-proof, and reverse-polarity protected.
  • Lightweight & highly portable
Current price is $427.99
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  • Free 30-day returns
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Sold and shipped by R/A Hoerr Incorporated
4.503411675511751 stars out of 5, based on 1319 seller reviews(4.5)
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5 out of 5 stars
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Showing 1-2 of 2 reviews

Mar 21, 2026
Mark
Sold and shipped byR/A Hoerr Incorporated
5 out of 5 stars review

Verified Purchase

It's definitely an investment that's worth the mo.

Like any other product that costs a lot of money I can criticize this item for a few minor flaws in general but overall C-TEK makes a nice charger, I think this makes 4 now. It's definitely the most expensive of all the ones I bought but when you start investing big money in home made inverter generators then you have to spend the money for a good charger. I've got 3 two hundred amp hour generators and I can charge all of them with this one charger, not all at once of course but this charger uses the correct charging stages for lithium batteries so it definitely worth the investment.

Helpful?4F10UWC4BJIS326787637
Apr 24, 2026
Walmart customer
Sold and shipped byR/A Hoerr Incorporated
5 out of 5 stars review

Verified Purchase

Great for Mild Hybrid Battery Maintenance

The CTEK 40-328 PRO25S is an excellent charger for my BMW 4 Series Mild Hybrid with a B58 Engine. I connect the charger once a month for six hours to maintain the vehicle batteries.

Helpful?4F10UWC4BJIS326787637