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BP-K75L v2 — High-Capacity USB-C Battery for Kenwood TH-D74 & TH-D75
More Power. Modern Charging. Built to Last.
The BP-K75L is a 5,000mAh (36Wh) extended-life battery pack that replaces the stock 1,820mAh Kenwood battery — delivering 2.7× the capacity. Charge it with any USB-C cable, swap the cells when they wear out, and finally use your D74 or D75 all day without carrying spares.
Not compatible with the TH-D72 or the stock desk cradle.
Designed, printed, and hand-assembled in Colorado, USA.
Specifications:
Compatibility:
Kenwood TH-D74A and TH-D75. Not compatible with the TH-D72.
What's Included:
Design Details:
The v2 includes a metal hinge, included belt clip spacer, and a fix for the low-power default behavior found in v1. The locking mechanism is different from the stock battery — do not bend the latch outward, as this will damage it. If you need help with installation, watch this video.
Each battery is 3D-printed and hand-assembled — minor texture variations are cosmetic and do not affect performance.
Charging Notes:
Not all USB-C cables are created equal. If charging doesn't start, try a different cable. USB-A to USB-C cables are the most universally reliable. PPS-capable chargers will negotiate the optimal charge rate automatically.
Recommended Charger:
Any USB-C charger rated 15W or higher will charge the battery at full speed. Lower-wattage chargers will still work — they'll just charge slower. PPS (Programmable Power Supply) chargers will automatically negotiate the optimal charge rate but are not required. A USB-A to USB-C cable with a standard USB-A wall adapter also works and is the most universally reliable option.
Charging Indicator:
User-Serviceable Cells:
The BP-K75L is designed for long-term ownership. When cell capacity eventually degrades, you can open the pack and replace the Samsung 50E 21700 cells yourself. No need to buy a whole new battery.
Printable Replacement Parts:
Want to print your own? ASA or ABS filament strongly recommended.
Lead Time & Shipping:
Batteries are made to order in small batches. Current lead time is posted at the top of the site — please check there for the most up-to-date estimate. Shipping options and costs are calculated at checkout.
FAQ:
Q: My battery isn't charging.
A: Try a different USB-C cable. If the red light flashes, the battery detected a cable issue — swap it and try again.
Q: Can I replace the cells myself?
A: Yes. The BP-K75L is user-serviceable. The cells are Samsung 50E 21700s and can be swapped when needed.
Q: I have a Version 1 battery and it defaults to low TX power. Is there a fix?
A: Yes. Version 1 could cause the radio to default to low power on startup. You can still toggle to high power manually. This was fixed in Version 2, and a retrofit fix was deployed to affected v1 customers. If you're still experiencing this, contact me directly.
Q: Is this compatible with the stock desk cradle?
A: No. The BP-K75L is not compatible with the Kenwood stock desk cradle.
Q: How do I install the battery?
A: The latch mechanism is different from stock. Do not bend the latch outward. Watch the installation video for a walkthrough.
Shipping costs are calculated at check out.
A separate email is sent when your item is fulfilled and ready to head your way. The tracking number can take up to 48 hours to update.
USPS, UPS and FedEx are delivery options for USA.
UPS, FedEx and DHL are delivery options for International Customers only.
USA Note: USPS shipments are often delayed but rarely lost. USPS has been known to take up to 30 days to deliver.
International Note: You are responsible for all additional costs related to customs and duties.
Not only is the battery pack fantastic, the communication and responsiveness of the seller is absolutely top notch.
Finally a product that extends the battery life of my TH-D74 beyond 4 hours! If you have the 74 or 75, you need this.
I would highly recommend this product. High quality and great packaging of the product.
Great job solving a problem with high end handheld radios! Thank you!
This battery with its USB-C charging port and hi-capacity transformed my Kenwood D75 from a good radio into an exceptional radio, no regrets. If you own a D74 or D75 radio you need this battery.
This battery is a powerhouse. It turns the D75 into an all day radio. It will add some bulk, but if you're like me you like a larger radio anyway. The hand-feel is great and the fitment is very secure with tight tolerances. I did use a small diameter soldering iron tip to melt a small whole through the battery case so the charging LED is visible without removing the battery from the radio. I recommended this battery to a friend who also has the D75 and he purchased one as well.
This is a much needed addition for this radio. I love it!