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The Lezyne Mega C GPS bike computer together with the Lezyne Mega XL is the top model from Lezyne. Both have no touch screen. The Mega C is equipped with a color display.
The Lezyne Mega C has a 2.2-inch color display. This is the essential difference to the Lezyne Mega XL GPS bike computer. The Mega XL has a 2.7-inch black and white display.
Due to the color display, the battery life of the Mega C is only up to 32 hours. Because of the black and white display the Mega X is working up to 48 hours. But the Mega XL is 10 grams heavier.
All other information corresponds to the presentation of the Lezyne Mega XL GPS-Fahrradcomputer.
With the models without touchscreen Lezyne follows a similar concept as Wahoo (Wahoo Elemnt and Wahoo Elemnt Bolt). From my point of view, a touch screen is not necessary with a GPS bike computer. Button operation is better under wet conditions and when wearing gloves.
gps-radler.de reporteds on his tests of the two GPS bike computer Lezyne Mega XL and Lezyne Mega C in a post.