The acronym "RBA" stands for "Rebuildable Atomizers", an important kind of vaping atomizer system. Both RTA and RDA are types of RBA. RTA (Rebuildable Tank Atomizer) is a tank system and RDA (Rebuildable Drip Atomizer) or RDTA (Rebuildable Dripping Tank Atomizer) is a dripper system.
With Reconstruction, you build your own coil. In other words, you physically wrap a coil, attach it to the system and add a wick. For more information about rda tanks, you can visit https://www.vapehousehi.com/category/tanks/rda-tanks/.
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There are many different builds, each depends on the RBA type and the desired vape user wants to achieve. The main advantage to RTA and RDA is that you can construct your own coil to your desired resistance.
Before the store-buying "drop-in coils" became widely available, the RBA was the only way to get high-performance wafers. Today, RBA is used by purists who want to check their vape for their exact choice and those who want to vape as cheaply as possible.
The RDA requires that you drip your juice inside, close it (two or three puffs), then drip some more. An additional benefit with this is that you can change your fluids more often, but can be a pain when moving around a few bottles – an RTA may be a better option.
An RTA is a tank system with a reconstruction system. You fill it and wipe and refill until the liquid is exhausted. The facility comes with a small performance sacrifice and RTAs are difficult to manufacture as they are assembled with multiple parts.