"Even if it isn't perfect", would be like having a 5 lb fire extinguisher filled to 8 oz and calling it "Not Perfect". Or a 3-axle motorhome with a 15 gallon gas tank.
Yes a smart charger will replace most of the depleted charge. Unlike a gas tank, batteries are snotty chemical laboratories. They'll sulfate then lattice link the crystals. When that happens you can push the little "Desulfate" button 100,000,000 times and the battery will just laugh at you. There are two remedies: Don't boondock a lot, and put your battery store on speed-dial.