DIY Mini Mobile Oxygen Pump for Fishing

If you're interested in fishing, check out this article and follow along to create a mini mobile oxygen pump.

You'll need the following items and should understand the specifications:

· 370 dual-pump structure;

· Two-speed control: The first speed runs a single pump, while the second speed runs both pumps;

· 2S2P 18650 lithium battery configuration, 7.4V 5.2Ah;

· DC2.1 charging port;

· Dimensions of the casing: 1159055mm;

· Weight: 528g;

· Battery life: Estimated to last over 10 hours (with both pumps running).

Once completed, if needed, you can make further optimizations, such as:

· Switch to a Type-C charging port;

· Add USB output;

· Create a lighter, more compact version.

Here's the finished product:

Front section, including the switch:

Back section:

Overall weight as shown: 528g

Completion.