Power Up Your Builds!
Classic 9V Motor is back!

Motorize your LEGO creations with this essential 56-piece Technic Power Pack from 1991! Add life to your vintage sets or create new moving masterpieces.

LEGO Power Pack set 8720 - 56 pieces, Supplemental theme, product photo Pin It
LEGO Power Pack set 8720
🏛 Supplemental
Set #8720

Power Pack

The Power Pack 8720-1 is a fantastic supplemental set for adding motorized functionality to your LEGO creations.

🏆 Best For: Ideal for kids and adults interested in adding basic motorization to their LEGO models. ⏱ 1.5 hr build 🧩 56 pcs
★★★★☆ 4.0

Fans appreciate the Power Pack for its ability to bring older LEGO models to life, though some find the 9V system outdated compared to newer motorization options. The set is praised for its completeness and the nostalgia it evokes, but the condition of the battery box is a common concern due to potential corrosion.

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📝 Our Take

The Power Pack 8720-1 is a fantastic supplemental set for adding motorized functionality to your LEGO creations. Released in 1991, this set provides the essential components needed to bring your LEGO models to life, including a 9V motor, battery box, gears, and axles.

This set is perfect for LEGO enthusiasts who enjoy experimenting with Technic elements and adding movement to their builds. It's a great way to learn about basic mechanical principles and enhance the playability of existing LEGO sets. The set includes a variety of gears and axles, offering plenty of opportunities for creative building.

Skip this if you're not interested in motorized LEGO models or prefer purely static displays. If you're primarily focused on minifigure collecting or intricate building techniques, other sets might be a better fit. Consider investing in newer Power Functions or Powered Up systems for more advanced control options.

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🧱 Building Experience

🧩
56
Pieces
⏱
1.5h
Build Time
📊
Beginner
Difficulty
Build Highlights:
  • Simple and straightforward instructions for incorporating the motor and battery box.
  • Introduction to basic gear ratios and mechanical principles.
  • Encourages experimentation and creative problem-solving.
  • Provides the building blocks for making static models move.

📈 Investment Analysis

→ Price stable
B
Investment Grade
⏳ Active
The Power Pack 8720-1 holds moderate investment potential due to its age, rarity, and the enduring appeal of LEGO motorization. While not as sought after as some licensed sets, its complete components and functional nature make it desirable for collectors and builders looking to restore or enhance vintage LEGO models. The limited availability of complete, working sets could drive up prices over time. However, the relatively low piece count and the potential for battery box corrosion should be considered as risks.

Not Financial Advice: Content is for educational purposes only. Past performance doesn't guarantee future results. Full disclaimer

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The Power Pack 8720-1 offers a taste of early LEGO motorization, contrasting with modern Power Functions and Powered Up systems which offer more advanced control and customization. While this set is simpler, its vintage appeal and compatibility with older LEGO models make it a unique addition to any collection. Consider newer motorization systems for more features, but this set provides a nostalgic glimpse into LEGO's technological evolution.

📦 Full Parts Inventory - 31 unique parts • 56 total pieces

Motor, 9V 5 x 4 x 2 1/3, Dark Gray Bottom Motor, 9V 5 x 4 x...
Part #: 2838c01 1× Light Gray
Battery Box, 9V 4 x 14 x 4 with Dark Gray Base [Complete Assembly] Battery Box, 9V 4...
Part #: 2847c01 1× Light Gray
Plate 1 x 2 Plate 1 x 2
Part #: 3023 4× Light Gray
Technic Gear 8 Tooth Technic Gear 8 Tooth
Part #: 3647 2× Light Gray
Technic Gear 24 Tooth [Old Style - Three axle holes] Technic Gear 24 T...
Part #: 3648a 1× Light Gray
Technic Gear 24 Tooth Crown with Flat Teeth Technic Gear 24 T...
Part #: 3650a 1× Light Gray
Technic Pin without Friction Ridges Lengthwise Technic Pin witho...
Part #: 3673 4× Light Gray
Technic Brick 1 x 2 [1 Pin Hole] Technic Brick 1 x...
Part #: 3700 4× Light Gray
Technic Brick 1 x 4 [3 Pin Holes] Technic Brick 1 x...
Part #: 3701 2× Light Gray
Technic Axle 4 Technic Axle 4
Part #: 3705 2× Black
Technic Axle 6 Technic Axle 6
Part #: 3706 2× Black
Technic Axle 8 Technic Axle 8
Part #: 3707 1× Black
Technic Plate 2 x 4 [3 Holes] Technic Plate 2 x...
Part #: 3709 2× Light Gray
Plate 1 x 4 Plate 1 x 4
Part #: 3710 4× Light Gray
Technic Bush Technic Bush
Part #: 3713 3× Light Gray
Technic Axle 10 Technic Axle 10
Part #: 3737 1× Black
Technic Plate 2 x 8 [7 Holes] Technic Plate 2 x...
Part #: 3738 1× Light Gray
Technic Axle Pin without Friction Ridges Lengthwise Technic Axle Pin ...
Part #: 3749 1× Light Gray
Technic Brick 1 x 6 [5 Pin Holes] Technic Brick 1 x...
Part #: 3894 2× Light Gray
Technic Gear 16 Tooth with Round Holes [Old Style] Technic Gear 16 T...
Part #: 4019 1× Light Gray
Technic Gear 14 Tooth Bevel Technic Gear 14 T...
Part #: 4143 2× Light Gray
Technic Wedge Belt Wheel [aka Pulley] Technic Wedge Bel...
Part #: 4185 2× Light Gray
Technic Bush 1/2 Toothed Type I [+ Opening] Technic Bush 1/2 ...
Part #: 4265a 3× Light Gray
Technic Axle 3 Technic Axle 3
Part #: 4519 1× Black
Technic Worm Gear Technic Worm Gear
Part #: 4716 1× Black
Plate 2 x 4 with Electric Contacts Plate 2 x 4 with ...
Part #: 4757 1× White
Plate 2 x 8 with Electric Contacts Plate 2 x 8 with ...
Part #: 4758 1× White
Wire with Brick 2 x 2 x 2/3 Pair, 162L Wire with Brick 2...
Part #: 5306bc162 1× Black
Rubber Band Medium (Square Cross Section) Thin Cut Rubber Band Mediu...
Part #: 70012 2× Black
Rubber Band Medium (Square Cross Section) Rubber Band Mediu...
Part #: 71156 1× Black
Technic Rubber Belt Medium [24mm ID] [Round Cross Section] Technic Rubber Be...
Part #: 85544 1× Red
The Power Pack 8720-1 is a great source for vintage Technic gears, axles, and the 9V motor system. The inclusion of the 9V motor and battery box makes it valuable for restoring or creating motorized LEGO models from the late 20th century.

🛒 Where to Buy

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💎 Notable Parts

Light Gray Motor, 9V 5 x 4 x 2 1/3, Dark Gray Bottom (1x) $10.00
Light Gray Battery Box, 9V 4 x 14 x 4 with Dark Gray Base [Complete Assembly] (1x) $15.00
Light Gray Technic Gear 24 Tooth [Old Style - Three axle holes] (1x) $3.00
Light Gray Technic Gear 24 Tooth Crown with Flat Teeth (1x) $2.00
Black Rubber Band Medium (Square Cross Section) Thin Cut (2x) $0.40
Est. BrickLink Part Value
$30.40

💡 MOC Potential

🚗 Motorized cars and trucks
🤖 Simple walking robots
🌳 Windmills and other kinetic sculptures

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Charts Inventory Statistics

32
Unique Parts
55
Total Pieces
0
Minifigures
Inventory Version: 2

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