Birch Grolar Battery Endurance Test: How the Grolar Tackles Trails

The Birch Grolar is designed for hunters, outdoorsmen, and riders who require a dependable off-road eBike for transporting gear on challenging terrains. To see how it really performs, we ran a full battery endurance test on mixed terrain, simulating a realistic hunting-load scenario.

The Setup

We started with a fully charged battery under controlled conditions: auto drive mode, limited throttle, and speed capped at 20 mph. 

The Results:

Trail Performance

The Grolar handled standard off-road trails extremely well. On rolling dirt paths, fire roads, and mild climbs, the dual 750W motors delivered smooth, steady torque. The fat tires and frame geometry kept it planted, and the bike felt stable even with extra weight strapped down.

Where it does show some limits is on steep, technical terrain when you’re hauling a full load. At these inclines, it’s best just to put the bike into walking mode and go on foot from here to avoid any spills or accidents. 

The added weight and incline make the battery work harder, which means a greater decrease in battery life. For anyone hauling meat, decoys, or heavy packs, sticking to moderate grades is the smarter path.

Battery Behavior

The most important takeaway from the test is that the Grolar’s battery drains at a consistent pace during the first half of the ride, then drops significantly faster in the second half.

In the early part of the ride, the consumption rate is steady and reliable. Even with added gear weight, the power delivery stays consistent, and you don’t notice any performance fade.

Once the battery dips below the halfway mark, the drain accelerates noticeably—especially if you’re climbing or riding over thick mud, sand, or loose rock. This is typical for high-load scenarios, but it’s something riders need to consider when planning long hunts or backcountry trips. Range anxiety isn’t an issue as long as you plan your route with this second-half drop-off in mind.

Real-World Takeaways

• Great for normal to moderately challenging trails
  The Grolar shines on rolling terrain and general off-road travel. Smooth power, stable handling, predictable control.
  

• Not ideal for steep technical climbs with heavy gear
  The bike can do it, but the strain increases battery burn and reduces efficiency fast.
  

• Battery drains much faster in the final 40–50%
  Plan your trip accordingly. The first half of the battery feels strong; the second half disappears quickly under load.
  

• Still delivers consistent performance
  Even as the battery drops, the motor output remains steady. No sudden shutdowns—just faster consumption.

Final Thoughts

The Birch Grolar is a capable, dependable trail bike when used within its strengths. For hunters and outdoor users carrying real-world weight, it’s excellent on moderate terrain and long, rolling approaches. Just understand its limitations: avoid ultra-steep technical climbs with heavy gear, and always account for the faster battery decline in the second half of your ride.

Looking for an eBike built for real-world hunting and off-road use? The Birch Grolar delivers dependable power, stable handling, and the range you need when the terrain gets unpredictable. Explore the full Birch lineup to find the machine that fits your next backcountry mission.