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Partner vs. ACEII One

Tennis Ball Machine Comparison — Which one is right for you?

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How they Stack-up

Tennibot Partner V2
ACEII One
Price
$2,245
$1,099 (Kickstarter); ~$2,099 retail
Mobility
Autonomous movement with player tracking
Advertised autonomous movement
Max Ball Speed
10–70 mph
Up to 80 mph
Ball Capacity
140 balls
120 balls
Battery Life
~4–5 hours
~2 hrs active (8 hrs feed)
Battery Type
10.5Ah Makita-compatible
Removable lithium
Max Spin
3,000 RPM
Not clearly specified
Charge Time
90 minutes
~2 hours
AI Features
Player tracking, court vision
Dual 1080p cameras (as advertised)
App Control
Full mobile app (real-time control + drill customization)
iOS/Android (as advertised)
Weight
35.4 lbs
Not clearly specified
Dimensions
17.7″ x 22.6″ x 21.5″
Suitcase-style design
Safety
Human detection sensors
No safety features specified
Guarantees
60-day money back
Kickstarter terms apply
Warranty
3 years
Not clearly specified
Made in USA
Yes 🇺🇸
No

The Bottom Line

ACEII One is a Kickstarter-funded ball machine that raised ~$825K from 679 backers with ambitious AI and mobility claims in a portable suitcase design.

But as of March 2026, it hasn't shipped (pushed to May 2026). It claims only 2 hours of active battery life, holds fewer balls, uses 1080p cameras (vs 4K), and has no established warranty or support infrastructure.

ACEII is a promising concept. The Tennibot Partner is a proven product you can buy and use today with a 60-day guarantee and 3-year warranty.

"I backed ACEII on Kickstarter but it kept getting delayed. I needed a machine now, not eventually. Bought the Partner and it's exceeded expectations — the AI tracking is legit."
Alex N. Tennis Player, Chicago, IL

Frequently Asked Questions

Has ACEII One shipped yet?

No. ACEII One ran a successful Kickstarter (679 backers, ~$825K raised) with an original delivery estimate of December 2025. As of March 2026, delivery has been pushed to May 2026. The Tennibot Partner is available for immediate purchase and shipping.

How does ACEII compare to Tennibot?

ACEII One claims dual-camera AI, court movement, and gesture controls in a portable suitcase design. However, it hasn't shipped, has only 2 hours of active battery life (vs 4–5 for Tennibot), holds 120 balls (vs 140), uses 1080p cameras (vs 4K), and has no established warranty or support. Tennibot Partner is a proven, shipping product.

Is the ACEII One suitcase design practical?

The all-in-one suitcase concept (machine + balls + racket holder) is appealing for portability. However, fitting a ball machine, 120 balls, and a racket into one case likely involves compromises on ball capacity and machine size. The Tennibot Partner holds 140 balls and is designed for performance first.

Does ACEII One really use gesture controls?

ACEII claims touch-free controls: wave to start, clap to pause. These are unverified manufacturer claims from pre-launch materials. Real-world gesture recognition in outdoor environments (wind, sun, multiple people) is technically challenging. The Tennibot Partner uses a proven mobile app interface.

Should I back ACEII One or buy Tennibot?

ACEII One's Kickstarter has ended but the product hasn't shipped (estimated May 2026). Crowdfunding carries risk: delayed timelines, evolving specs, and uncertain support. The Tennibot Partner ships today with a 60-day money-back guarantee, 3-year warranty, and established customer support.

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Sources

ACEII specs are based on Kickstarter campaign materials. Product has not shipped as of March 2026.