We've all been there. That red battery icon— 9% on the 12th hole, down to 5% by the 15th, and the dreaded 1 %before you even make it to the car. The important call you missed. The Uber you couldn't request after the round. The client who couldn't reach you. The Venmo for the golf bet that had to wait. It doesn't have to be this way.
Four to five hours on the course. GPS, scoring apps, music, photos of that hole-in-one you'll never forget. Add warm-up and the 19th hole and your phone has been off the charger for 8 hours. The Booster slides right into your Birdie Bag phone pocket and charges silently all round long.
Realtors, mortgage brokers, financial planners, business owners — you cannot be out of pocket. A missed call on the 14th hole can cost you a deal. The Booster keeps you fully charged and reachable from the first tee to the handshake at the car.
Texting, Instagram, TikTok, Snapchat — today's younger golfers are on their phones 24/7. And many forget to charge from the night before. A 10,000mAh Booster fully charges most smartphones twice. It's the safety net for the generation that needs it most.
The Solution
The Bad Bunzy Booster was designed with the Birdie Bag in mind from the very beginning. When we engineered our front-facing exterior phone pocket on the Birdie Bag, we built it with exactly enough space behind your phone for the Booster to sit flush, hidden, and charging all round long.
No wires hanging out. No extra pouch. No fumbling. Your phone goes in the pocket, the Booster is already behind it, and the built-in retractable cable — whichever one fits your device — connects them in seconds. By the time you make the turn at the 9th hole, your phone is fully charged.
Slide the Booster into the space behind your phone in the Birdie Bag's front-facing pocket
Choose your cable— pull out the Lightning cable for older iPhones, or the USB-C cable for newer iPhones, Androids, and earbuds
Plug in your phone and slide it in the same pocket. The digital display shows you exactly how much charge is left on the Booster
Play your round. By the turn your phone is charged. Fully. Done. Never panic again.
Designed Together
The Booster was engineered specifically to pair with the Bad Bunzy Birdie Bag. Our front-facing phone pocket has just enough depth behind it to fit the Booster perfectly — slim, secure, and completely out of the way while charging your phone through an entire round. It also works in any bag, any pocket, anywhere you need power.
10,000mAh of power packed into a device smaller than most wallets. Here is what is inside.
Power Delivery fast charging at up to 22.5W — fills your phone dramatically faster than standard charging. Most modern smartphones go from near-dead to fully charged before the back nine is over.
A genuine 10,000mAh A-grade li-polymer battery — enough to fully charge most smartphones twice. One Booster charge lasts multiple rounds before it needs recharging itself.
Abuilt-in Lightning cablefor older iPhones and a built-in USB-C cablefor newer iPhones, Android phones, AirPods Pro, and most modern accessories. Both retract neatly. No cables to pack, lose, or forget. Plus afree 8" USB-C to USB-A cable is includedin the box for recharging the Booster itself from any USB port.
A clean digital percentage display tells you exactly how much charge remains on the Booster — no guessing, no surprises. You always know exactly how much power you have left.
At just 5.73" × 2.68" × 0.79" and 8.3 oz, the Booster slides into the Birdie Bag phone pocket without adding noticeable bulk to your bag. Slim enough to carry in a jacket pocket too.
The USB-C input/output port handles both incoming and outgoing power. Recharge the Booster via USB-C, and use it to charge any compatible device simultaneously with another connected device via USB-A.
Full Specifications
Every spec, every measurement, every charging rate — exactly as confirmed by our manufacturer. No estimates. No guessing.
| Battery Capacity | 10,000mAh (Real Capacity) |
| Battery Type | A-Grade Li-Polymer |
| Fast Charge | 22.5W PD Fast Charging |
| USB-C Input | 5V/3A · 9V/2A · 12V/1.5A (MAX: 18W) |
| USB-C Output | 5V/3A · 9V/2.22A · 10V/2.25A · 12V/1.67A (MAX: 22.5W) |
| USB-A Output | 5V/3A · 9V/2A · 10V/2.25A · 12V/1.5A (MAX: 22.5W) |
| Built-In Cables | Lightning (for older iPhone) + USB-C (for newer iPhone & Android) |
| Included Cable | Free 8 inch USB-C to USB-A charging cable |
| Digital Display | Yes — battery percentage readout |
| Power Button | Yes — on/off control |
| Product Dimensions | 5.73" × 2.68" × 0.79" (145.5 × 68 × 20mm) |
| Net Weight | 8.3 oz · 0.52 lbs (235g) |
| Gross Weight | 11.8 oz · 0.74 lbs (335g) |
| Case Material | ABS + PC |
| Available Colors | Black · White |
| Warranty | Bad Bunzy Golf Limited Lifetime Warranty |
Built for the golf course. Useful everywhere else. Whenever and wherever you do not have access to your regular charger.
Slide into the Birdie Bag phone pocket. Charges your phone silently through 18 holes. Never panic over the red battery icon again.
No outlets at the beach. No problem. The Booster keeps your phone alive for music, photos, and messages all day long.
Long drives, passengers without chargers, dead car charging ports. The Booster handles it all with 10,000mAh of backup power.
Airports, flights, hotel rooms with one outlet. The Booster fits in any carry-on and keeps your phone and earbuds charged anywhere in the world.
Yes — and not by coincidence. The Birdie Bag's front-facing exterior phone pocket was designed with the Booster in mind. There is dedicated space behind the phone slot specifically sized for the Booster to sit flush and secure. Slide it in, connect the built-in cable to your phone, and it charges silently the entire round.
The Booster has two built-in retractable cables. If you have aniPhone 15 or newer— use the USB-C cable. If you have aniPhone 14 or older— use the Lightning cable. Both cables retract neatly into the Booster body when not in use.
Yes. The built-in USB-C cable works with virtually all Android phones, Samsung Galaxy devices, Google Pixel phones, AirPods Pro, and most modern wireless earbuds that charge via USB-C. If your device uses USB-C — the Booster handles it.
At 10,000mAh, the Booster can fully charge most modern smartphones approximately 2 full times, depending on your phone's battery size. For a typical round of golf requiring one full charge, the Booster provides ample reserve power for multiple rounds before needing to be recharged itself.
Every Bad Bunzy Booster comes with a free included 8" charging cable— USB-C on one end and a standard USB-A on the other. Simply plug the USB-A end into any USB port — a wall adapter, your laptop, a car charger, or any USB hub — and the USB-C end into the Booster's input port. The digital display shows the charging percentage in real time so you always know when it's ready and when it's full.
Absolutely. The Booster is a fully standalone portable power bank that works everywhere — at the beach, on road trips, while traveling, in any golf bag, or in your pocket. The Birdie Bag integration is a bonus, not a requirement. The Booster is useful anywhere you need power and don't have access to a regular charger.
Yes. At 10,000mAh the Booster falls within TSA guidelines for carry-on lithium batteries (under 100Wh). It cannot go in checked luggage, but it is carry-on approved. Always check current TSA guidelines before flying as regulations can change.
The Booster was built to work with the Birdie Bag — and the Birdie Bag was built to work with everything else.
