Onyx 255

AC/DC Dual Balancing Charger

Onyx 255
Stock Number: DTXP4256
Big, 60W AC power supply on each output5 Year Warranty

Two independent outputs — identical features & functions!

If you can own only one charger, it should be the Onyx 255. It can peak charge a 15-cell NiCd at the same time it's balance charging a 6S LiPo—and do both anytime and anywhere there's AC or DC power. Push-buttons let you program up to 10 battery charging routines for easy reuse, and a reverse-backlit LCD lets you easily view eight types of pack/cell data and safety alerts even when lighting conditions are at their worst. And, since it's an Onyx charger, it also offers the extra value and long-lasting protection of an industry-leading 5-year limited warranty.

*U.S. Patent D749,046 and Patent Pending


Charge rates up to 6A, plus the ability to charge 1-15 nickel-based or 1-6S lithium cells make the Onyx 255 a match for any charging need. Dual outputs make it an especially good choice for models that use two packs simultaneously and modelers who run and recharge multiple batteries in a single session. Both outputs can peak charge NiCd/NiMH cells and balance 2-6S lithium packs for maximum voltage. Separate jacks make it as useful for radio packs as power packs. Simple menus, push-button controls and a backlit, reversed LCD make it easy to use anytime, in any lighting anywhere there's AC or DC power.

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Each output includes built-in balancing for up to 6S LiPo/Li-Ion/LiFe batteries plus a built-in charge jack for 4, 5 or 8 cell radio packs.
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With the Onyx 255, you can charge a pack or two packs of different chemistries at the same time.


Stock Number: DTXP4256
AC input: 110V AC 60Hz
DC Input: 11-15V DC
Safety/Protection Devices: solid-state reverse polarity and current overload circuitry; 0-300-minute safety timer; fan
Case size: 6.0 x 2.75 x 7.25 in (152 x 70 x 184 mm)
Weight (w/o cords): 19.5 oz (554 g)

Specifications for each output:

Output Power: 60W (AC & DC)
Battery types: 1-15 NiCd or NiMH (1.2-18.0V)
1-6S Lithium (3.7-22.2V)
Battery capacity range: 100-60,000mAh
Programmable model memories: 10 (each output)
Fast charge current: 0.1-6.0A linear
Fast charge termination: peak detection (NiCd/NiMH); cc/cv (Lithium batteries)
Ni Peak sensitivity: 3-20mV, adjustable
Ni Auto-trickle current: 1/20 fast charge setting or 0-250mA (manual)
Lithium balancing accuracy: 5mV per cell
Lithium node current (max.): 300mA
Controls: 4 push buttons
Display Type: 2x16 backlit, reversed LCD
Data displayed: input, output, peak and individual cell voltages; charge current, capacity & time; battery chemistry; alerts & errors
Input connections: detachable DC lead with alligator clips; detachable AC lead with standard plug
Output connections: built-in banana jacks; built-in jack for 4-, 5- and 8-cell radio packs
Included output adapters: Banana to Star Plug and banana to standard adapters; 2-6S balancing board w/JST XH connector

Recommended Options:
DTXC2222 Charge Lead - Banana Plugs/Traxxas®
DTXC2223 Charge Lead - Banana Plugs/Vendetta, Mini Q
DTXC2225 Charge Lead - Banana Plugs/4 mm Bullet Plugs

Traxxas is a registered trademark of Traxxas Corporation.

Fact Sheet