FitMyRC

Blog

Practical RC battery fitment, safety, and buying guides.

Actionable insights from the FitMyRC team to help you buy the right pack with confidence.

Explore FitMyRC

Internal Resistance (IR): The One Number That Tells You When to Retire a Pack
safety

Internal Resistance (IR): The One Number That Tells You When to Retire a Pack

Your battery charges to 4.2V, so it's fine, right- Wrong. Internal Resistance is the true measure of health. Learn how to read it and when to trash a pack.

C-Ratings Exposed: Marketing Hype vs. Real-World Performance
education

C-Ratings Exposed: Marketing Hype vs. Real-World Performance

Is that 100C battery really delivering 500 amps? We dive deep into the marketing myths of LiPo C-ratings and explain how to actually size a battery for your RC car.

The Ultimate Connector Showdown: IC5 vs. XT90 vs. TRX
education

The Ultimate Connector Showdown: IC5 vs. XT90 vs. TRX

Confused by battery plugs- We break down the differences between IC5, XT90, and Traxxas connectors to help you decide which one is right for your RC build.

Volt-Sag Explained: Why Your Fast Car Feels Slow
education

Volt-Sag Explained: Why Your Fast Car Feels Slow

Ever hit the throttle and felt your car hesitate- Or had a fully charged pack trigger Low Voltage Cutoff in minutes- We explain voltage sag and how it kills performance.

Hard Case vs. Soft Case: Does It Really Matter-
education

Hard Case vs. Soft Case: Does It Really Matter-

Confused between hard case and soft case LiPos- We break down the durability vs. weight trade-offs to help you decide which battery style fits your RC driving style.

How to Measure Your Battery Tray Like a Pro (And Avoid Returns)
how-to

How to Measure Your Battery Tray Like a Pro (And Avoid Returns)

Stop guessing if that LiPo will fit. We show you exactly how to measure your RC car's battery tray, accounting for screw heads, straps, and wire exits.

Soldering 101: Swapping Connectors Without Melting Your Battery
how-to

Soldering 101: Swapping Connectors Without Melting Your Battery

Scared to touch a soldering iron to your LiPo- We teach you the safe way to swap connectors, emphasizing the 'One Wire Rule' to prevent shorts and fires.

LiPo Storage Mode: The Secret to Tripling Your Battery Life
how-to

LiPo Storage Mode: The Secret to Tripling Your Battery Life

Why did your expensive battery die over the winter- We explain the chemistry of LiPo degradation and why 'Storage Mode' is the most critical button on your charger.

Reviving a 'Dead' LiPo: When to Try and When to Run Away
how-to

Reviving a 'Dead' LiPo: When to Try and When to Run Away

Your charger says 'Low Voltage' and refuses to charge. Is your expensive battery trash- We discuss the controversial 'NiMH Trick,' safety risks, and when to cut your losses.

Top 5 High-Punch Batteries for the Arrma Kraton 6S
buying-guides

Top 5 High-Punch Batteries for the Arrma Kraton 6S

Unlock the true speed of your Arrma Kraton 6S. We rank the top 5 LiPo batteries that fit the tray and deliver the amps you need for massive backflips.

Traxxas iD Explained: How to Use Aftermarket Batteries in Your Slash
buying-guides

Traxxas iD Explained: How to Use Aftermarket Batteries in Your Slash

Understand iD connectors, adapters, and safe alternatives for Traxxas vehicles.

2S vs. 3S: Is the Speed Boost Worth the Broken Parts-
buying-guides

2S vs. 3S: Is the Speed Boost Worth the Broken Parts-

Love your Traxxas Slash but hate the battery prices- We explain the Traxxas iD system and show you how to safely run cheaper aftermarket LiPos.

The Puffed Pack: Why LiPos Swell and Safe Disposal Methods
safety

The Puffed Pack: Why LiPos Swell and Safe Disposal Methods

Is your battery looking swollen- We explain the chemistry behind 'puffing,' how to tell if it's safe to use, and how to dispose of it properly without starting a fire.

Are 'Amazon Special' Batteries Worth the Risk-
safety

Are 'Amazon Special' Batteries Worth the Risk-

Is that 2-pack of LiPos for $40 a steal or a fire hazard- We compare budget brands like Zeee and Hoovo against premium giants to see if you really get what you pay for.

The Hidden Dangers of Parallel Charging
safety

The Hidden Dangers of Parallel Charging

Charging six batteries at once sounds great, until your garage fills with smoke. We explain the risks of parallel charging and the one rule you must never break.