HXJNLDC 3.7V 310mAh 502030 Battery for VXI BlueParrott B250-XT Bluetooth Headset
Quick take
This 502030 3.7V rechargeable lithium polymer battery (310mAh, 0.3A max) is built for replacement use in select VXI BlueParrott headsets and certain small cameras/dash cams that need a low-power 3.7V pack in a similar size. It includes built-in protection circuitry and a 2-wire connector module, but you should double-check connector polarity and be prepared for DIY splicing if your original connector does not match.
Pros and cons
Pros
- Compact 502030 size (about 31 x 20 x 5mm) and 3.7V nominal voltage for compatible devices.
- Designed for replacement across specific listed models (including VXI BlueParrott B250-XT/B250-XT+ style batteries and some dash cams/keychain cameras).
- Comes with safety/protection board features for overcharge, overdischarge, overcurrent, and short circuit.
- Includes a 2-wire JST Pitch 1.25mm connector module and heat-shrink insulation sleeve to help with a clean install.
Cons
- Connector polarity and plug type may not match your device, which can require cutting and soldering to align positive and negative leads.
- Rated max current is 0.3A, so it is intended for low-power electronics, not power-hungry replacements.
- Fit depends on the device’s internal space and the battery’s form factor, since it is a specific 31 x 20 x 5mm class pack.
What buyers think
Buyer-review evidence points to a generally positive replacement experience for devices that use this kind of battery pack. Common themes include an “exact fit” feel when the dimensions and connection points are compatible, and improved operation in units that were not holding charge or were showing low-battery behavior. Several buyers also highlighted the practical installation reality: connector/polarity details matter, and some installs required re-soldering or splicing to match their device’s wiring (heat-shrink sleeve was noted as helpful for tidier work). Overall, review evidence is limited in scope to small electronics repairs, but the recurring pattern is that the battery works well when the buyer verifies polarity and wiring/connector compatibility before committing to solder.
Key specs that matter for compatibility
- Battery chemistry: Lithium polymer (rechargeable).
- Nominal voltage: 3.7V (full charge voltage up to 4.2V).
- Capacity: 310mAh, (about 1.14Wh).
- Maximum current: 0.3A.
- Size: about 31 x 20 x 5mm (502030 format), lightweight (around 5.7g).
- Connector: 2-wire JST Pitch 1.25mm connector module, plus insulation/heat-shrink sleeve.
Installation considerations (polarity and connector fit)
For replacement batteries like this, the biggest avoidable problem is incorrect wiring. The red wire is the positive “+” lead and the black wire is the negative “-” lead. If your original battery uses a different plug style or if the connector’s polarity arrangement differs from what you expect, plan on verifying carefully before connecting power.
Some users choose to make future swaps easier by snipping and splicing to the existing device wires, using the included heat-shrink tubing for insulation and strain relief. This can be a straightforward approach if you are comfortable with basic soldering and careful wiring, but it also means this battery is best suited to DIY-capable buyers.
Who this battery is best for
- You have one of the supported low-power devices that specifically lists a compatible 3.7V 310mAh 502030 style battery replacement.
- You need a compact replacement that matches the 31 x 20 x 5mm class footprint.
- You can handle a repair install that may involve soldering, especially if the connector on your device does not perfectly match the battery module.
- Your device is showing “can’t hold charge” symptoms or low-battery behavior and you want a battery-level fix instead of replacing the whole unit.
Who should avoid it
- You need a higher current battery. With a 0.3A maximum rating, it is meant for low-power electronics.
- Your device requires a different voltage or capacity class (especially if the original battery is not in the 3.7V to 4.2V range).
- You are not comfortable opening the device or doing basic splicing. If you cannot verify wiring/polarity and cannot solder, you may want to source a replacement that matches your existing connector directly.
Pros and cons recap
- Pros: compact 502030 3.7V format, 310mAh capacity, built-in protection circuitry, and a connector module plus heat-shrink sleeve for cleaner DIY installs.
- Cons: compatibility depends heavily on connector/polarity and internal space, and the 0.3A max current limits it to low-power electronics.
Verdict: is it worth it?
If your VXI BlueParrott headset or compatible small electronics need a 3.7V 502030 LiPo replacement around 310mAh, this is a sensible battery-level upgrade, especially for repairs where the original battery has degraded. It is worth your attention, but only if you confirm the voltage class, physical space, and wiring polarity, and if you are prepared for soldering or splicing when connectors do not line up.
FAQs
How do I confirm the battery polarity before installing?
This battery uses red for positive “+” and black for negative “-”. Double-check your device wiring and align like-to-like before charging the unit.
What does “502030” mean on this battery?
“502030” is the common shorthand for the battery’s physical form factor, approximately 31 x 20 x 5mm, which must match your device’s internal space and battery bay design.
Is 310mAh a direct upgrade from smaller batteries?
It can be, if your device originally used a lower-capacity pack within the same 3.7V class and compatible size. Capacity improvements only help if the rest of the device electronics and power draw are compatible.
Do I need to solder, or can I use the included connector?
The battery includes a 2-wire JST Pitch 1.25mm connector module. If your device’s battery leads match the same connector style and polarity, you may be able to use it directly. If the connector type or polarity arrangement differs, soldering and splicing may be required.
What devices is this battery suitable for?
It is intended for specific listed compatible devices that require a 3.7V, 310mAh, low-power 502030 LiPo battery. It may also work for other 3.7V to 5V electronics with low power needs (under about 1.14Wh), but high-current or high-performance power tools and model aircraft are not the target use.
Specifications
| Product Title | 3.7V 310mah 502030 Battery for VXI BlueParrott B250-XT Bluetooth Headset Battery Replacement dashcam Nextbase Dash cam 402G 412GW 512G Cobra 840 Keychain cam 808 Small Camera C3,C11 16 |
|---|---|
| Category | Electronics > GPS, Finders & Accessories > GPS System Accessories > Batteries |
| Brand | HXJNLDC |
| Manufacturer | HXJN |
| Model Name | 502030 |
| Model Number | 502030 |
| Item Weight | 6 Grams |
| Number of Batteries | 1 C batteries required. (included) |
| UPC | 049500840181 |
| Battery Cell Type | Lithium Polymer |
| Battery Capacity | 310 Milliamp Hours |
| Voltage | 3.7 Volts (DC) |
| Reusability | Rechargeable |
| Amperage | 0.3 Amps |
| Unit Count | 1 Count |
| Battery Weight | 6.3 Grams |
| Item Dimensions | 1.22 x 0.79 x 0.2 inches |
| Antenna Location | Camera, GPS |
| Battery Cell Composition | Lithium Polymer |
| Recommended Uses For Product | Camera, GPS |
Available variants
Item Package Quantity
- 1
- 2
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