I've been using a Garmin eTrex 20 for years on my weekend hikes, but lately it’s been freezing randomly while I’m out on the trail. It usually happens after a few hours of use, and the screen just locks up - no buttons respond, and I have to pull the battery to reboot it. I’ve already tried updating the firmware to the latest version and resetting the device to factory settings, but no luck. This is frustrating because I rely on it for navigation in areas without cell service, and I’m worried it might leave me stranded on a longer trek. I’ve noticed the freeze happens more often when the battery is below 40%, but I’m not sure if that’s a coincidence or related. Has anyone else experienced these freezing issues with older Garmin units? Is the battery likely the culprit, or could it be a hardware problem? Would swapping in a fresh battery or a different model be my best bet for reliable navigation out on the trail?

On 02/04/2026 at 6:45 AM, the_hiker said:

I've been using a Garmin eTrex 20 for years on my weekend hikes, but lately it’s been freezing randomly while I’m out on the trail. It usually happens after a few hours of use, and the screen just locks up - no buttons respond, and I have to pull the battery to reboot it. I’ve already tried updating the firmware to the latest version and resetting the device to factory settings, but no luck. This is frustrating because I rely on it for navigation in areas without cell service, and I’m worried it might leave me stranded on a longer trek. I’ve noticed the freeze happens more often when the battery is below 40%, but I’m not sure if that’s a coincidence or related. Has anyone else experienced these freezing issues with older Garmin units? Is the battery likely the culprit, or could it be a hardware problem? Would swapping in a fresh battery or a different model be my best bet for reliable navigation out on the trail?

Sounds like a real pain out there on the trail. From what you’re describing, the battery definitely seems like a prime suspect, especially since the freezing spikes when it drops below 40%. Older NiMH or alkaline batteries can start to struggle under load as they drain, causing the device to hiccup or freeze. Swapping in a fresh set of high-quality lithium AA batteries might help stabilize things.

That said, if the problem persists even with new batteries, it could be a hardware issue - maybe something with the internal power regulation or the device’s aging components. Given your reliance on it for navigation, it might be worth testing a different model if you can borrow one, just to see if it’s the unit itself or something environmental. Meanwhile, carrying a backup power source or a secondary GPS app on your phone (for areas with some signal) might give you peace of mind on longer trips.

That freeze happening mostly when the battery dips below 40% definitely points toward a power issue rather than a pure software glitch. Lithium AA batteries can lose voltage under load as they age, which might cause the GPS to lock up if it’s not getting steady power. Swapping in fresh high-quality lithium AAs or even rechargeable NiMHs with good capacity could be a quick test to see if that stabilizes things.

If you want to avoid the hassle of constantly swapping batteries on longer hikes, a newer Garmin with a built-in rechargeable battery might be worth considering. The eTrex 20 is solid but pretty old now, and newer models have better power management and more robust hardware to handle extended use. But definitely try fresh batteries first before upgrading - it’s the simplest fix and might save you some cash.