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Head-to-head · Best Level 2 Portable EV Chargers

J+ BOOSTER 2 vs Lectron 40A J1772 Portable (Wi-Fi)

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

J+ BOOSTER 2 comes out ahead by a narrow margin (4.6 vs 4.4). J+ BOOSTER 2 is best for: drivers who want one very rugged 40 A charger to use at home and carry on road trips. Read the strengths below before deciding.

J+ BOOSTER 2
Higher ratedRanked #2 in Best Level 2 Portable EV Chargers
J+ BOOSTER 2
2 sources

The J+ Booster 2 is a 40 A, dual-voltage portable J1772 charger with an aluminium body and a 21 ft or 25 ft cord. It takes swappable NEMA 14-50 and NEMA 5-15 adapters. InsideEVs drove two pickup trucks over it, froze the cord and submerged the unit, and the charger kept working; it scored 4.4/5. EVchargerReviews.net (4.7/5) ran it at 40 A for hours with no thermal throttling and called it the most premium portable unit it had tested. It suits drivers who want one rugged charger for the garage and the road. Anyone with an existing NEMA 14-50 outlet installed upside down, or on a tight budget, should look elsewhere.

Strengths
  • — Kept working after InsideEVs drove an F-150 Lightning and a Rivian R1T over it
  • — Ran for hours at 40 A with no thermal throttling in a 50 kWh stress test
  • — IP67-rated, and it passed InsideEVs' submersion test after more than 30 minutes underwater
Watch-outs
  • — Input cables are only about a foot long, so outlet position and orientation matter
  • — The most expensive portable charger EVchargerReviews.net has tested
  • — The cord earned only an average score in InsideEVs' deep-freeze test
Buy at jplusbooster.comFull review →
Lectron 40A J1772 Portable (Wi-Fi)
Ranked #3 in Best Level 2 Portable EV Chargers
Lectron 40A J1772 Portable (Wi-Fi)
2 sourcesall derived$250as of Oct 10

The Lectron 40A J1772 is a popular, affordable portable charger with a genuinely useful onboard LCD and, in the Wi-Fi version, app scheduling. TorqueNews called it a "fantastic value". The catches are a short cord and a documented tendency to throttle below 40A when it runs warm.

Strengths
  • — Full 40A / 9.6 kW output through a NEMA 14-50 plug
  • — Clear LCD display shows live amps, voltage, energy in kWh, charge time and temperature
  • — Wi-Fi version adds app monitoring and scheduling, with the app praised for simplicity
Watch-outs
  • — Cord is relatively short at 16-18 feet
$250 · Buy at ev-lectron.comFull review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

J+ BOOSTER 2

The Booster 2 is a premium alternative to the Grizzl-E Mini Connect (40A) and the Splitvolt 40A NEMA 14-50. Its main selling points are a crush-rated aluminium body, IP67 sealing and swappable locking plug adapters. Its controls are a single button and LED indicators, so buyers who want an LCD and app scheduling may prefer the Lectron 40A J1772 Portable (Wi-Fi).

Lectron 40A J1772 Portable (Wi-Fi)

Splits the difference between the smart Grizzl-E Mini Connect and the bare-bones Splitvolt: it has an LCD and an optional Wi-Fi app like the Grizzl-E but a shorter cord than the MUSTART, and it throttles below its rated 40A when warm.

Specs side-by-side

SpecJ+ BOOSTER 2Lectron 40A J1772 Portable (Wi-Fi)
Max Current40 A (adjustable from 6 A)—
Max Power9.6 kW (NEMA 14-50)—
Cable Length21 ft or 25 ft16 ft
ConnectorJ1772J1772
Input AdaptersNEMA 14-50; NEMA 5-15 optional—
WeightUnder 8 lb (21 ft version)—
Ingress RatingIP67—
Crush Rating6,600 lb—
Max Output—40A / 9.6 kW
Plug—NEMA 14-50
Display—LCD (amps, volts, kWh, temp)
Connectivity—Wi-Fi (Lectron app)
Certification—ETL, Energy Star, FCC; UL 2251 handle
Warranty—2-year
← See the full ranking of best level 2 portable ev chargers