3 Things to Know About the Roomba i4 vs i3
Regarding the Roomba: 1. The only difference is the battery The i4 has a larger battery that extends cleaning time. Everything else — navigation, suction, brush system, dustbin — is identical to the i3.
The larger battery matters for homes over 1,500 square feet The i4 can often finish cleaning in one pass on bigger floor plans. The i3 will need to recharge and resume on homes that size.
Buy the i3 if you don’t need the extra runtime There is no other advantage to the i4. Save your money and get the i3 unless your home is large enough to justify the bigger battery.