Dophin · Battery / AC-DC
BP-1 Battery Air Pump
- Air output
- 0.4 L/min
- Tank size
- 30–60 L
Keeping fish or shrimp oxygenated in a bag or bucket on the way home, or during a power cut.

Boyu · Battery / AC-DC
A twin-outlet air pump that switches automatically to its internal rechargeable battery, or an external 6 V DC source, when the mains goes off. Keeps oxygen flowing through a power cut.
Updated
Keepers in areas with regular power outages who want aeration to carry on without them.
Boyu does not state battery run time for this model.
| Model | Air output | Outlets | Power | Dimensions (L × W × H) | Output |
|---|---|---|---|---|---|
| S-1800 | 8 L/min | 2 | 10 W | 20.6 × 14.9 × 9.6 cm | 2 x 4 L/min |
Figures from the maker's published specifications. Makers revise products, so check the current figures before buying. Photos supplied by the brand or its distributor.
Dophin · Battery / AC-DC
Keeping fish or shrimp oxygenated in a bag or bucket on the way home, or during a power cut.
Dophin · Battery / AC-DC
Anyone in an area with regular power cuts who wants filters and livestock kept oxygenated.
Dophin · Battery / AC-DC
Keeping a sponge filter running through short power cuts in a small tank.
SunSun · Battery / AC-DC
Larger tanks and fish rooms that need backup aeration.
Quick answers about the Boyu S-1800 AC/DC Air Pump, drawn from its specs.
Keepers in areas with regular power outages who want aeration to carry on without them.
Boyu does not state battery run time for this model.
Other air pumps worth comparing: Dophin BP-1 Battery Air Pump, Dophin BP-188 AC/DC Air Pump, Dophin BP-189 AC/DC Air Pump. Add any of them to the compare table to see the specs side by side.
Tap Compare on this page and on any other air pump you are considering, then open the compare table. It lines up every published spec side by side and lets you pick the size of each product.