Buying Guide: Tattu R-Line V5 850mAh 4S LiPo Battery
MEPSKING Expert Assessment
Based on MEPSKING’s analysis of the specifications and exact-product owner reports, the Tattu R-Line Version 5.0 850mAh 4S 150C LiPo battery is best understood as a performance battery for FPV builds that can comfortably carry approximately 100g.
The pack is relatively short but thick at 59 × 30 × 32mm. This shape can work well on compact 3.5-inch and 4-inch frames, provided the battery deck and straps have enough clearance. It should not be confused with thinner Tattu 850mAh LiHV packs that weigh around 74–78g.
One pilot using the exact 850mAh V5 on a 3.5-inch quad described the aircraft as a heavier build. Another owner reported strong performance on a 2.5-inch setup, although this is a build-specific experience and does not mean that a 100g battery is suitable for every 2.5-inch or 3-inch drone.
Real-World Flight Feel
Compared with a lighter 650mAh or 750mAh battery, the 850mAh pack provides additional usable energy and can make the aircraft feel more settled during forward flight. The additional weight also increases momentum, reduces instantaneous direction changes and may require more braking distance.
This makes the 850mAh version attractive for powerful 3.5-inch freestyle builds and 4-inch racers that need more capacity without moving to a much larger 1300mAh battery. Very light 3-inch builds may remain more agile with a smaller pack.
The 150C rating is useful for comparing Tattu models, but it should not be interpreted as a guarantee that the battery, XT30 connector and complete power system can sustain the mathematical 127.5A result continuously. Motor choice, propeller load, wiring, connector temperature and battery condition still determine safe real-world current.
Is This the 74g Tattu 850mAh Battery?
No. The lightweight battery sometimes discussed by FPV pilots is a different LiHV model charged up to 4.35V per cell. The product on this page is a standard R-Line V5 LiPo with a listed weight of approximately 100g and a maximum charging voltage of 4.2V per cell.
This distinction matters because:
1. The 74–78g weight should not be used when calculating sub-250g compliance.
2. This R-Line V5 must not be charged using a 4.35V LiHV setting.
3. The thicker 32mm pack may fit differently from a lightweight long-format battery.
Which Tattu Battery Should You Choose?
| Battery | Best Application | Purchase Recommendation |
|---|
| Tattu R-Line V5 850mAh 3S | Lightweight drones designed specifically for 3S | Choose only when the motor and ESC setup requires 3S |
| Tattu R-Line V5 850mAh 4S | Performance-focused 3.5–4 inch FPV builds | Best balance of 4S punch, capacity and XT30 compatibility |
| Tattu R-Line V5 850mAh 6S | Lightweight high-RPM 6S racing builds | Choose only for a 6S-compatible motor and ESC configuration |
| Tattu R-Line V5 1300mAh 4S | Conventional 4–5 inch freestyle drones | Choose when additional flight time matters more than low battery weight |
The cell count must match the drone’s power system. A 3S, 4S and 6S battery with the same 850mAh capacity are not interchangeable simply because the capacity number is identical.
850mAh or 1300mAh for a 4S Drone?
Choose 850mAh when:
• You fly a 3.5-inch or compact 4-inch drone.
• Your aircraft uses an XT30 connector.
• Lower battery weight and faster handling are priorities.
• The frame cannot comfortably carry a conventional 1300mAh pack.
Choose 1300mAh when:
• You fly a conventional 4-inch or 5-inch 4S drone.
• Your aircraft uses an XT60 connector.
• More flight time is more important than minimum weight.
• The motors and frame are designed around a heavier battery.
Installation Notes
Secure the battery with a correctly sized strap and a non-slip battery pad. The battery must not move during rapid direction changes or crashes.
Keep the balance lead away from the propellers. An FPV owner reported damaging a battery after a loose balance lead reached a propeller during a crash. Tucking the balance lead alongside the main power cable is a practical preventive step.
Do not force the battery into a frame where it contacts sharp carbon edges. Check that the XT30 lead reaches the drone without being stretched or positioned near a propeller.
Charging and LiPo Care
Charge this battery with a balance charger using standard LiPo mode. Set the maximum voltage to 4.2V per cell or 16.8V for the complete 4S pack. Do not use a 4.35V LiHV charging setting.
A routine 1C charge rate is approximately 0.85A for an 850mAh battery. For storage, bring the cells to approximately 3.8–3.85V per cell and keep the pack in a cool, dry and fire-resistant location.
Allow the battery to cool before recharging. Do not charge a swollen, punctured or crash-damaged pack, and never leave a LiPo battery unattended while charging.
Browse more compatible options in the MEPSKING FPV battery collection.
Final Purchase Recommendation
Buy the Tattu R-Line V5 850mAh 4S if you need a high-performance XT30 battery for a 3.5-inch or 4-inch FPV racing or freestyle drone. It is particularly suitable when a 650–750mAh pack does not provide enough usable flight time, but a 1300mAh pack is too large or heavy.
Choose a lighter battery if staying below 250g is critical. Choose the Tattu R-Line V5 1300mAh 4S for a conventional 5-inch build. Confirm the aircraft’s supported cell count, connector, battery space and expected takeoff weight before ordering.
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