How to Charge Non-Traxxas Batteries on a Traxxas Charger
Yes, Traxxas EZ-Peak chargers can charge batteries without Traxxas iD. When you connect a non-iD battery, the charger can’t identify it (the charge LEDs sweep back and forth), so you use the charger’s Advanced (manual) mode to select the battery type (LiPo or NiMH), cell count and charge rate yourself. You’ll need a connector that matches the charger’s output, and for LiPo batteries the balance lead must be connected to the charger’s balance port or the correct balance adapter.
By Kyle HilsonUpdated: October 20263 min read
Step by step
- Check the battery: note type (LiPo or NiMH), cell count (2S, 3S…) and capacity (mAh).
- Connector: use an adapter from your battery’s connector to the Traxxas charge lead, or a Traxxas-to-other lead of good quality.
- LiPo balance lead: plug it into the charger’s balance port or a matching Traxxas balance adapter.
- Connect the battery. The charger shows it can’t read an iD (LEDs sweep).
- Enter Advanced mode as your charger manual describes, and select the battery type.
- Set the charge rate: typically 1C (for a 5000 mAh pack, 5 A) or lower; the charger may limit maximum current.
- Start charging and stay nearby.
Exact button steps differ between EZ-Peak models; follow your charger’s manual.
Safety rules
- Never charge a LiPo in NiMH mode.
- Always connect the balance lead for LiPo.
- Charge on a non-flammable surface or in a LiPo bag.
- Never leave charging batteries unattended.
- Don’t charge swollen or damaged packs.
- Check the charger defaults to the right type; some default to LiPo when a balance plug is detected.
Connectors and adapters
Traxxas chargers use Traxxas connectors. Batteries with Deans, XT60, EC3 or other plugs need an adapter. Choose adapters with wire thick enough for the charge current and make sure the polarity is correct. Many owners re-solder their batteries to Traxxas connectors to simplify charging; only do this if you’re confident soldering high-current leads.
Choosing the charge rate
For most LiPo and NiMH packs, a 1C charge rate is a safe default: the rate in amps equals the capacity in amp-hours. Lower rates are gentler and help batteries last longer. Faster charging needs packs rated for it. Charge times at different rates are explained in how long to charge an RC car battery.
Why iD exists
Traxxas iD lets the charger read the battery type and capacity automatically and set safe settings, reducing mistakes. With non-iD batteries, you take on that job yourself, so double-check every setting before starting. Battery life and care are covered in how long a Traxxas battery lasts.
Common problems
- Charger won’t start: wrong type selected or balance lead not connected.
- Cell imbalance error: the pack is unbalanced or damaged; try balance charging slowly, or retire it.
- Charger stops early: loose connector or overheated adapter.
Charging NiMH packs
NiMH packs don’t have balance leads. In Advanced mode, select NiMH and a charge rate around 1C or lower; the charger stops when it detects the pack is full. NiMH packs get warm near the end of charging, which is normal, but they shouldn’t get hot. Let them cool before using or charging again. Old NiMH packs may need a few cycles to regain capacity, and packs that get very hot or won’t hold a charge should be replaced.
FAQ
Can a Traxxas charger charge other brands?
Yes, in Advanced/manual mode with the right connector.
Do I need a balance adapter?
For LiPo, the balance lead must connect to the charger.
What charge rate should I use?
1C or lower is a safe default.
Can I charge NiMH on a Traxxas charger?
Yes, select NiMH mode for non-iD packs.
More on this topic: the complete RC Cars guide covers the basics behind this article.
About 20 years in RC. Mostly boats in the NAVIGA Mini Eco Expert class, with many self-made parts; also a King Motor Baja 5B, a home-built electric plane, home-built nitro planes he has flown, and an RC helicopter. More about SwellRC
