Tip: 

1.This battery length (155mm), could not fit most cars with smaller battery tray, such as rustler, stampede, Bandit, etc. if you want to find a shorter one: here is 5000 3s short-size battery with dimensions: 138mmx46mmx38mm. 

2.This a battery could be used for most 1/10 Traxxas truck, but it comes with xt60 plug and deans plug, not Traxxas plug, so you need to solder the plug or change the adapter for your Traxxas model.

3.: If you use the 5000mAh 3S lipo battery for Arrma new items, such as BIGROCK 4x4 3S BLX or GRANITE 4x4 BLX, you need to go arrma battery category. 

Features:

- Stable automatic stacking technology enables single-cell capacities of 5000mAh.
- The most strict single cell capacity, voltage, resistance, discharge curve matching process.
- Superior Japan and Korea Lithium Polymer raw materials.
- The battery is with male XT60 plug.
- One extra female XT60 plug inside the box for free.

Gens Ace is one of the top rank battery corporations with deep research and manufacturing on NIMH, LI-PO, LI-FE by the effort of 200 professional engineers and technicians with 20 years exquisite battery technology. The Gens Ace brand holds the traditional concept of "excellent quality", "Optimization"& "Priority" on Sales & Services. All batteries are tailored for various scales of the RC Models such as electronic cars, nitro cars, airplanes, vessels and also other models, toys, electric tools, electric bikes, electric autos, digital products etc.

Specifications:

- Minimum Capacity: 5000mAh
- Configuration: 3S1P / 11.1V / 3Cells
- Discharge Rate: 50C
- Max Burst discharge Rate: 100C
- Net Weight(±20g): 380g
- Dimensions: 155.3mm x 46.3mm x 24mm (L x W x H)
- Charge Plug: JST-XHR
- Discharge Plug: Male XT60 plug
- One extra female XT60 plug inside the box for free.
- Standard Balance Plug + Equipped with industry-standard XT-60.

Applications: (sourced from customers' reviews)

Traxxas: 
Traxxas Slash 4x4 upgrade( 30-40 min at the track non-stop)
Fits a Traxxas Slash 4x4 LCG and Arrma Vorteks with no problems. 
Huge power in my 2wd slash
Used on Traxxas Xmaxx as a dual 6S and get about 35-30 min with heavy bashing/driving.
I use them in a Traxxas XMAXX and a Traxxas Aton. No problems 
Works perfectly with my Trx-4.
Excellent battery and no issues using it in my Slash VXL. Clean soldering and heat shrinking. Would recommend over the Traxxas lipo.
I use them for my Traxxas Stampede VXL. The battery is a bit too long for the battery tray, but I made it fit.

HPI: 
This pack has great punch and lasted over 40 minutes doing standing backflips and speed runs with a Savage XS. It wasn't easy getting it to fit in. It's way better suited for bigger vehicles.

Arrma:
e-revo savage flux or my arrma talion
I am currently using 2 of these 11.1v 5000mah batteries in my arrma outcast a so so good
works great in my Arrma Nero and Arrma Typhon

Axial:
Great battery on the yeti xl. Lasts a long time and is still going strong.

Drone:
DJI F550 Confident performance and no puffing after 3 months of daily use.
Fit nice and snug in the battery compartment of the Traxxas Aton drone. and it has done great. I've got over 100 flights on it and it's still going strong. 
perfect for my HeliMax Form 500 drone. Price is good. So far, the quality is satisfactory. 
I'm using one on a 500mm, 2212 920kv, 1185 gram scratch-built quad.
It works perfectly in a frame f450.