Tracki Pro GPS Tracker for Vehicles, 4G LTE, Long Battery Life

Why it's worth it

The Tracki Pro carries a 10,000mAh battery rated at two to seven months of active tracking, or up to a year asleep. It's the one to get for a trailer, boat, or piece of equipment that sits for long stretches and needs to be found if it walks off.

The battery is the entire point of this tracker. Ten thousand milliamp-hours is phone-power-bank territory, and Tracki rates it at two to seven months of active reporting at one- to five-minute intervals, or up to twelve months in sleep mode. If you own a trailer that lives behind a fence for a season, you can mount this once and check it next spring.

It's also the most flexible on placement, with a built-in magnet, an included screw mount, and a weatherproof case. On a trailer tongue or inside a toolbox, the screw mount is the better choice — magnets and washboard gravel roads eventually disagree. The Wi-Fi fallback helps a bit indoors, where pure GPS usually gives up, though you shouldn't count on it in a concrete parking deck.

From our review of 7 hidden car gps trackers, by Ben Carter, Tech Editor

What we like

• +The battery is the entire point of this tracker
• +It's also the most flexible on placement, with a built-in magnet, an included screw mount, and a weatherproof case
• +For small fleets, the alert set is the deepest here: speed, geofence, movement, idle time, impact, and low battery, delivered by…
• +The honest trade is size

What to know

• –It's the largest device in this guide by a wide margin
• –The stated battery range is wide — two months to seven — because it depends heavily on your update interval
• –Subscription required, and owner feedback flags plan structure and upsells as a recurring annoyance