Browse
- Sets
- All Sets
- New Sets
- Recently Retired Sets
- Sets Retiring Soon
- Sets Available Soon
- Set Release Rumors
- Minifigs
- All Minifigs
- New Minifigs
- Recently Retired Minifigs
- Minifigs Retiring Soon
Deals
Analysis
- Sets
- Themes
- Subthemes
- Years
- Most Valuable
- Most Expensive
- Most Owned
- BE 100 Index
- Minifigures
- Most Valuable
- Most Owned
My CollectionSign In or Up

Region

Sets
Dacta
Technic
Transformer 9V

9833 LEGO Dacta Technic Transformer 9V

Name: LEGO Dacta Technic Transformer 9V
Brand: LEGO
SKU: 9833-1
Rating: 4.5 (18 reviews)

Images 2Description 1

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Transformer 9V since January 2018. Medium accuracy

LEGO 9833 Transformer 9V was a Dacta set released in 1996. The current value for a new and sealed Transformer 9V is estimated at $25, with an average annual growth of approximately 2%. Current used prices for Transformer 9V range from $21 to $26, depending on the set's condition, with an average price of $21 for those in good overall condition.

All regions

All regions 4
United States 4

For Sale (New/Sealed)

	(US) Genuine LEGO 9833 Mindstorms Transformer Power AC Adapter Battery Charger	BrickEconomy Choice $24.99
	(US) Lego 9833 MINDSTORMS 9V Transformer AC Adapter Battery Charger 4237771	$24.99 0.0%
	(US) DACTA 9833 70931 AC Transformer Charger (New)	$25.00
	(US) NEW Lego 9833 MINDSTORMS 9V Transformer AC Adapter Battery Charger 4237771	$27.50 +10.0%

Sets in Dacta / Technic


	9609 Technology Resource Set Theme / Subtheme Dacta / Technic Year 1995 Pieces 1,718 Availability Retired Buy this set at eBay	Value $798.96 I own this set I want this set

	1034 Teachers Resource Set Theme / Subtheme Dacta / Technic Year 1985 Pieces 1,501 Availability Retired Buy this set at eBay	Retail $129.00 Value $857.68 Growth +564.9% Annual growth 6.2% I own this set I want this set

	9701 Control Lab Building Set Theme / Subtheme Dacta / Technic Year 1995 Pieces 557 Availability Retired Buy this set at Bricklink	Retail $149.00 Value $388.38 Growth +160.7% Annual growth 3.2% I own this set I want this set

	9700 Technic Control Centre Theme / Subtheme Dacta / Technic Year 1987 Pieces / Minifigs 471 / 4 Availability Retired Buy this set at eBay Bricklink	Value $370.81 I own this set I want this set

	1092 Technic Control II Theme / Subtheme Dacta / Technic Year 1986 Pieces 463 Availability Retired Buy this set at Bricklink	Retail $191.00 Value $261.16 Growth +36.7% I own this set I want this set

	9618 Structures Set Theme / Subtheme Dacta / Technic Year 1997 Pieces 463 Availability Retired Buy this set at Bricklink	Retail $79.90 Value $123.10 Growth +54.1% Annual growth 1.6% I own this set I want this set

	1090 Technic Control 1 Theme / Subtheme Dacta / Technic Year 1986 Pieces 404 Availability Retired Buy this set at Bricklink	Retail $139.99 Value $197.54 Growth +41.1% I own this set I want this set

	9665 Mechanical Engineering Theme / Subtheme Dacta / Technic Year 2003 Pieces 318 Availability Retired Buy this set at eBay Bricklink	Retail $149.99 Value $350.00 Growth +133.3% Annual growth 4.1% I own this set I want this set

	1032 Technic II Powered Machines Set Theme / Subtheme Dacta / Technic Year 1984 Pieces 278 Availability Retired Buy this set at eBay	Retail $79.99 Value $178.05 Growth +122.6% Annual growth 1.8% I own this set I want this set

	9630 Simple Mechanisms Set Theme / Subtheme Dacta / Technic Year 1997 Pieces 277 Availability Retired Buy this set at eBay Bricklink	Retail $79.99 Value $236.43 Growth +195.6% Annual growth 3.9% I own this set I want this set

	9605 4.5V Technic Resource Set Theme / Subtheme Dacta / Technic Year 1995 Pieces 268 Availability Retired Buy this set at Bricklink	Retail $74.99 Value $446.93 Growth +496.0% Annual growth 6.1% I own this set I want this set

	9702 Control System Building Set Theme / Subtheme Dacta / Technic Year 1993 Pieces / Minifigs 221 / 2 Availability Retired Buy this set at eBay Bricklink	Value $225.37 I own this set I want this set

	1030 Technic I Simple Machines Set Theme / Subtheme Dacta / Technic Year 1985 Pieces 179 Availability Retired Buy this set at eBay	Retail $74.99 Value $186.33 Growth +148.5% Annual growth 1.6% I own this set I want this set

	9604 Technic and Pneumatic Elements Theme / Subtheme Dacta / Technic Year 1992 Pieces 124 Availability Retired Buy this set at Bricklink	Retail $36.95 Value $64.26 Growth +73.9% Annual growth 2.4% I own this set I want this set

	1038 Universal Buggy Theme / Subtheme Dacta / Technic Year 1985 Pieces 119 Availability Retired Buy this set at eBay Bricklink	Value $74.92 I own this set I want this set

	9937 Small Chain Links Theme / Subtheme Dacta / Technic Year 1998 Pieces 108 Availability Retired Buy this set at Amazon ebay	Retail $7.49 Value $14.72 Growth +96.5% Annual growth 2.6% I own this set I want this set

	9617 Introducing Air Power Theme / Subtheme Dacta / Technic Year 1997 Pieces 89 Availability Retired Buy this set at eBay Bricklink	Retail $29.99 Value $161.68 Growth +439.1% Annual growth 6.2% I own this set I want this set

	9614 Pulleys Mini Set Theme / Subtheme Dacta / Technic Year 1993 Pieces 77 Availability Retired Buy this set at eBay	Retail $14.99 Value $30.97 Growth +106.6% Annual growth 2.3% I own this set I want this set

	9616 Wheels and Axles Set Theme / Subtheme Dacta / Technic Year 1997 Pieces / Minifigs 74 / 1 Availability Retired Buy this set at eBay	Retail $14.99 Value $27.96 Growth +86.5% Annual growth 3.2% I own this set I want this set

	9610 Gears Set Theme / Subtheme Dacta / Technic Year 1993 Pieces / Minifigs 67 / 2 Availability Retired Buy this set at eBay	Retail $12.50 Value $23.76 Growth +90.1% Annual growth 4.2% I own this set I want this set

	9612 Levers Set Theme / Subtheme Dacta / Technic Year 1993 Pieces 62 Availability Retired Buy this set at Amazon eBay	Retail $14.99 Value $29.42 Growth +96.3% Annual growth 2.9% I own this set I want this set

	9938 Conveyor Belt Links Theme / Subtheme Dacta / Technic Year 1995 Pieces 38 Availability Retired Buy this set at Bricklink	Retail $6.25 Value $12.99 Growth +107.8% Annual growth 7.3% I own this set I want this set

	9848 9V Lamps Theme / Subtheme Dacta / Technic Year 1997 Pieces 9 Availability Retired Buy this set at Bricklink	Retail $2.99 Value $32.92 Growth +1001.0% Annual growth 7.3% I own this set I want this set

	9615 Motor Add-On for Simple Mechanisms Theme / Subtheme Dacta / Technic Year 1997 Pieces 3 Availability Retired Buy this set at ebay Bricklink	Retail $31.99 Value $44.55 Growth +39.3% Annual growth 1.6% I own this set I want this set

	9751 Control Lab Serial Interface & Adapter Theme / Subtheme Dacta / Technic Year 1995 Pieces 2 Availability Retired Buy this set at Bricklink	Value $174.96 I own this set I want this set

My Collection

I own this set

I want this set

Set Details

Set number

9833-1

Name

Transformer 9V

Theme

Dacta

Subtheme

Technic

Year

1996

Availability

Retired

Pieces

1 (PPP $23.99)

Set Pricing

Retail price

$23.99

New/Sealed

Value

$25.00

Growth

+4.21%

Annual growth

+1.78%

90-day change

-1.75%

Used

Value

$21.43

Range

$21.00 - $25.72

Quick Buy

eBay

Buy

Lowest price

$24.99

Highest price

$27.50

*Listings are for new/sealed sets.

Set Predictions

New/Sealed

Today's value

$25.00

1 year forecast

$25.44+1.78%

5 year forecast

$27.22+8.89%

$27

$28

9833 Transformer 9V is projected to be valued between $27 - $28 within five years.

Set Facts

The adapter works with the 9798 Rechargeable Battery for LEGO MINDSTORMS NXT.

Regional Retail Prices

United States

$23.99

United Kingdom

£13.99

Canada

$33.99

Subtheme Analysis

Dacta / Technic

Sets

Years

1984 - 2003

Annual growth

+2.46% (this set +1.78%)

This set's annual growth (CAGR) vs. subtheme

Community Stats

Transformer 9V currently ranks #29 out of the top most owned sets in Dacta Technic.

#1Technic I Simple Machines Set

#2Simple Mechanisms Set

#3Technic II Powered Machines Set

#4Gears Set

#5Levers Set

#29Transformer 9V

#30Sound Element

About Dacta Technic

The LEGO Dacta Technic theme is a segment of the LEGO Dacta (later rebranded as LEGO Education) line, focusing on the Technic system of LEGO building. These sets are designed for educational contexts, emphasizing principles of mechanics, engineering, and applied science. Through specialized pieces like gears, axles, and beams, the Dacta Technic theme offers a hands-on approach to understanding complex mechanical concepts, making it a resource for classrooms and other educational settings aiming to teach STEM principles.

Technic consists of 30 sets that ran from 1984 to 2003. As of today, 1034 Teachers Resource Set is the most valuable Technic set with an estimated new/factory sealed value of $858.

This standard 9v transformer/charger plugs in to an AC outlet to recharge your #9798 Rechargeable Battery for LEGO® MINDSTORMS® NXT.

Description provided by LEGO©

Set Pricing Models

BrickEconomy uses a number of methods to determine the value of a set.

New/Sealed

Machine Learning/AI Model

Value (today)

$25.00

Value (in a year)

$25.44

Value (in 2 years)

$25.89

Accuracy

0.820000 High

Statistical Model

Value (today)

$23.86

Value (in a year)

(Possible plateau)

Value (in two years)

(Possible plateau)

Accuracy

0.342447 Low

Used

Machine Learning/AI Model

Value (today)

$21.43

Value (low range)

$21.00

Value (high range)

$25.72

Accuracy

0.765000 High

To learn more about how we calculate pricing and forecasting, check out our article on BrickEconomy’s Approach to LEGO Pricing and Future Value Predictions.

Explore

Sets Minifigs Deals

About Us

About BrickEconomy Contact Us Support Us by contributing to BrickEconomy

Support Us

Helpful Links

FAQs Widgets Sitemap

Follow BrickEconomy

LEGO, the LEGO logo, the Minifigure and the brick and knob configurations are trademarks and/or copyrights of the LEGO Group of companies which does not sponsor, authorize or endorse this site.
BrickEconomy, the BrickEconomy logo and all content not covered by The LEGO Group's copyright is, unless otherwise stated, ©2025 BrickEconomy.

Change Region

Changes the pricing currency and date formats to a specific region. Adjusts pricing and date formats to region.