About ESR
ESR is a global tech accessories company founded in 2009 and headquartered in Wilmington, Delaware, with a user base of more than 100 million people worldwide. Since 2018 the company has held a top-three ranking on Amazon for smart device protection, building out a catalog that spans phone cases, screen protectors, wireless chargers, and car mounts.
In 2021, ESR launched its HaloLock system, a MagSafe-compatible accessory ecosystem built around magnetic alignment for cases, chargers, and car mounts. The company has since extended that magnetic-charging engineering into OmniLock, its Qi2.2-certified car charger line with active CryoBoost cooling designed to counter the heat-related charging slowdown common on hot dashboards.
Brand website: esrtech.com
What ESR makes
ESR's range runs wider than the products we review. The lines we know best from our own testing are marked with a star:
HaloLock MagSafe Car Mounts
Vent and dashboard car mounts with 15W MagSafe wireless charging and aluminum-alloy construction. — featured on RevRated
OmniLock Car Chargers
Qi2.2-certified 25W car chargers with CryoBoost active thermoelectric cooling. — featured on RevRated
HaloLock MagSafe Cases
Protective phone cases with built-in magnetic alignment rings for MagSafe accessories.
Armorite Screen Protectors
Tempered-glass and film screen protectors for phones and tablets.
Home & Desktop MagSafe Chargers
MagSafe wireless charging stands and pads for desk and home use.
Why we recognized ESR
The RevRated Top Brand recognition isn't paid for and can't be applied for. We award it to the brands whose products consistently stand out in our hands-on category reviews. ESR earned it on the strength of the products below, evaluated the same way every product on this site is: bought, run on real vehicles, and judged on merit.
ESR products we rated highly
ESR HaloLock MagSafe Car Mount Charger
Delivers 15-watt MagSafe wireless charging through an aluminum-alloy mount arm and pad, with dual air-vent and dashboard mounting options in the box. In our testing it held up across more than 24,000 Amazon reviews at 4.3 stars, the deepest track record of any car mount we reviewed in the category.
Read the 8 Best Car Phone Mounts of 2026 guide →
ESR OmniLock Qi2.2 25W MagSafe Car Mount Charger with CryoBoost
Certified to the full Qi2.2 25W charging profile, backed by CryoBoost active cooling that keeps output from throttling as the phone and dashboard heat up. It landed at a genuine middle price point among the 25W-capable mounts we tested, between the budget passive-cooled units and the premium fan- or thermoelectric-cooled kits.
Read the 11 Best MagSafe Car Chargers of 2026 guide →What earned ESR the recognition
- A global tech accessories company with more than 100 million users worldwide, founded in 2009 and ranked in Amazon's top three for smart device protection since 2018
- Built one of the first dedicated MagSafe accessory ecosystems with the 2021 HaloLock launch, extending that magnetic-alignment engineering into car mounts, cases, and chargers
- The HaloLock car mount charger carries one of the deepest review bases we found in the car-mount category, with more than 24,000 Amazon ratings at 4.3 stars
- The OmniLock car charger is Qi2.2 certified at the full 25W output and uses active CryoBoost thermoelectric cooling to address the heat throttling that limits many passively cooled wireless car chargers
- Offers dual mounting hardware (vent clip and dashboard adhesive) on its car chargers, reducing vehicle-fit guesswork for buyers