Holy Stone HS720 Battery Not Charging: What the Problem Usually Means
If your Holy Stone HS720 battery is not charging, the issue is usually tied to the battery pack, charger, charging cable, USB power source, or the drone’s battery contacts.
The good news is that many charging failures are caused by simple compatibility or connection problems rather than permanent damage.
This guide explains the most common causes, the exact checks to run, and the safest ways to restore normal charging behavior without guessing.
Common Reasons the HS720 Battery Will Not Charge
The Holy Stone HS720 uses a lithium-polymer battery system, so charging depends on stable voltage, proper contact, and a healthy battery management circuit.
When one part fails, the battery may appear dead, charge extremely slowly, or show no charging light at all.
1. The USB power source is underpowered
Many charging problems start with the power source.
Some laptop ports, low-output adapters, and weak power banks do not provide enough current for a drone battery charger.
Use a wall adapter that delivers stable 5V output and sufficient amperage, preferably one recommended by Holy Stone or a reputable equivalent.
2. The charging cable is damaged
A frayed or internally broken USB cable can interrupt charging even when it still looks intact.
If the indicator light flickers or the charger works only when the cable is held at an angle, replace the cable immediately.
3. The battery is not seated correctly
The HS720 battery must align properly with the charging contacts.
Dust, slight misalignment, or worn connectors can prevent current from flowing.
Remove the battery, inspect the terminals, and reinstall it firmly.
4. The battery has entered protection mode
Lithium-ion and lithium-polymer batteries often include over-discharge protection.
If the voltage drops too low, the battery may stop accepting a charge until it is connected to the correct charger for a period of time.
In some cases, however, a deeply discharged battery may be permanently weakened.
5. The battery is aging or defective
Battery capacity declines over time.
A swollen pack, shortened flight time, rapid self-discharge, or unusually warm charging behavior can indicate cell degradation.
A faulty pack may not charge at all, even though the charger and cable are working correctly.
6. Temperature is outside the safe charging range
Drone batteries charge best at moderate room temperature.
If the battery is too cold after storage or too hot after use, the charger may refuse to start.
Let the battery rest at room temperature before trying again.
How to Diagnose a Holy Stone HS720 Battery Not Charging Problem
Use a step-by-step approach so you can isolate the faulty component.
Start with the easiest checks first and move toward battery-specific issues only after ruling out the charger and power source.
Check the charger indicator lights
Most HS720 charging setups include an LED indicator.
Note whether the light is off, blinking, red, green, or changing state when the battery is connected.
These signals can reveal whether the charger is receiving power and whether it detects the battery.
- No light at all often points to the wall adapter, cable, or power outlet.
- A light that changes when the battery connects suggests the charger detects a load.
- A constant fault signal may indicate battery incompatibility or battery failure.
Test a different USB adapter or outlet
Plug the charger into a known-good wall outlet and use a different adapter with adequate output.
If the battery starts charging, the original adapter was the problem.
Avoid relying on computer USB ports for drone batteries unless the manufacturer specifically allows it.
Inspect the battery contacts
Check for oxidation, dust, bent pins, or physical damage on both the battery and charger contacts.
Clean contacts gently with a dry microfiber cloth.
If you see corrosion, do not use liquids unless the manufacturer recommends a specific cleaning method.
Let the battery cool or warm to room temperature
If the battery was recently used in flight or stored in a cold environment, wait 20 to 30 minutes and try again.
Charging logic in many smart batteries blocks unsafe temperature conditions to reduce fire risk and cell stress.
Try another compatible HS720 battery, if available
Swapping in a known-working battery is one of the fastest ways to identify the faulty part.
If the replacement charges normally, the original battery is likely the issue.
If both batteries fail, the charger or power supply is more likely at fault.
Safe Fixes You Can Try at Home
Only use non-invasive troubleshooting methods.
Do not puncture, open, crush, or attempt to rebuild a lithium-polymer battery pack.
Damaged drone batteries can overheat or catch fire if handled incorrectly.
Reset the charging setup
Disconnect everything, wait a minute, then reconnect in this order: wall outlet, adapter, cable, charger, and finally battery.
This simple reset can clear a temporary connection fault or unstable power state.
Use the original or manufacturer-approved charger
Charging with the wrong adapter can cause inconsistent current delivery.
If you lost the original charger, replace it with a compatible model that matches the HS720 battery’s charging requirements.
Recharge before the battery fully drains
Repeated deep discharges shorten lithium battery lifespan.
If the battery repeatedly reaches zero, it may eventually stop accepting a charge.
Charging sooner after flight helps preserve performance and reduces the chance of protection lockout.
Store the battery correctly
Long-term storage affects charging health.
Keep the HS720 battery in a cool, dry place away from sunlight and extreme temperatures.
For extended storage, maintain a partial charge rather than leaving the battery fully drained for weeks.
When the Battery Itself Is the Likely Cause
If the charger, cable, outlet, and contacts all test fine, the battery pack is the most likely failure point.
Signs of battery damage or end-of-life include visible swelling, unusual odor, physical cracking, persistent overheating, and the inability to hold charge after a successful recharge.
A battery that shows no signs of life after repeated charging attempts may have an internal cell fault or battery management issue.
In that case, replacement is usually safer than continued troubleshooting.
How to Prevent HS720 Charging Problems in the Future
Preventive care reduces the chance of another Holy Stone HS720 battery not charging issue and helps extend battery life.
- Use a high-quality wall adapter with the correct output.
- Avoid charging on unstable or loose USB connections.
- Let the battery cool after flying before plugging it in.
- Do not leave batteries fully depleted for long periods.
- Inspect contacts regularly for dust and wear.
- Store batteries at moderate temperature and partial charge.
Signs You Should Replace the Battery or Charger
Replacement is the safest option when troubleshooting no longer points to a simple fix.
Replace the battery if it is swollen, physically damaged, or still will not charge after testing with another known-good charger.
Replace the charger or cable if the indicator never lights, charging is intermittent, or another battery charges normally with the same setup.
If the drone itself appears to have a charging port issue, the problem may extend beyond the battery pack.
In that case, professional inspection or manufacturer support is the best next step.
What to Tell Support If You Contact Holy Stone
Having the right details ready can speed up support.
Include the HS720 model, battery age, charger type, what the indicator lights do, whether the battery gets warm, and which troubleshooting steps you already tried.
Photos of the battery, charger, and contacts can also help support identify a defect faster.