(checked 2026-10-10)2-star 4% + 1-star 8% of 35,468 ratings.
A cordless silica-gel canister for closets, safes and cabinets that you recharge by plugging it in, not a room dehumidifier. Owners like that it keeps small spaces dry, but complain about color beads that don't change, frequent recharging and heat while it renews.
Top complaints
- Indicator beads don't change color
Bead color is a negative aspect on Amazon, with some units showing no color change at all, which makes it hard to tell when to recharge.
- Needs frequent, slow recharging
Rechargeability is mixed on Amazon, with some owners needing to recharge weekly. Eva-Dry says it lasts 20-30 days per charge, and BHG notes renewal takes 12-14 hours.
- Gets very hot; may not last
Heat is a negative aspect on Amazon (it gets very hot), and durability is mixed: some report two good years, others say it doesn't last.
What owners love
- Keeps small spaces dry
Moisture absorption is an Amazon positive, with owners saying it holds 50-60% humidity in small spaces.
- Reusable for years
BHG says the renewal process can be repeated for up to 10 years, making it a great value.
Source: Better Homes & Gardens - Cordless and spill-free
Eva-Dry says it hangs anywhere, is spill-free, and absorbs up to 6 oz before recharging, for areas up to 333 cubic feet.
Source: Amazon.com product page
- You need to dry a room or basement
- You won't recharge it every few weeks
- You want an exact humidity readout
- Gun safes, closets, cabinets, boats and cars
- No-cord, no-spill moisture control
- Reusable for years
Scores (tap for why)
What experts say
- Better Homes & Gardens: Best small (updated 2026-07-14): renewable for up to 10 years and a great value; it takes 12-14 hours to renew. BHG's text names the 'High Capacity' Eva-Dry (about 62 sq ft), which may be the larger E-500 rather than this E-333.