Thermacell E55 Rechargeable Mosquito Repeller

This compact device is excellent at keeping mosquitoes at bay. The scent cartridges need replacing, but the device is small, light, and highly effective.

Weight

0.8 lb (13 oz)

Packed size

7.9 × 4.8 × 8.4 cm (approx)

Materials

Molded hard plastic (likely ABS) housing with internal heater and built-in Li-ion battery; glass/plastic refill vial

Colors

graphite, blue

Changes from the last model

No major internal changes announced; EL55 adds integrated light; larger-battery E65/E90 introduced as variants

Is it worth the price over cheaper alternatives?

If you frequently host outdoor gatherings or car-camp with access to power, the convenience, odorless operation and area protection justify the premium; however ongoing cartridge costs should be considered.

How long does the battery last and is it enough for camping?

The internal battery runs about 5.5 hours per charge, adequate for an evening but generally insufficient for multiple nights without recharging or a larger-battery model (E65/E90).

Can I use it in light rain or leave it outside overnight?

No — the E55 is not waterproof; keep it under cover and avoid exposure to driving rain to prevent damage to the USB port and internals.

Does it repel all kinds of biting insects?

No — it targets mosquitoes and some biting flies responsive to metofluthrin vapor; reviewers report limited effect on gnats and black flies.

How much do replacement cartridges cost and how often do I need them?

Starter cartridge varies; replacement cartridges (40-hour or 120-hour options) can add significant lifetime cost — reviewers note refills can collectively exceed the device price over time.

What should I do if the battery seems dead after storage?

Charge the unit fully, remove the refill for long-term storage, and recharge periodically; isolated reports exist of batteries losing charge after storage but widespread failures were not reported and the unit has a 2-year warranty.